Gerri Elliott, one of Microsoft’s (MSFT) star execs, left the company early this year to spend more time with her family. Yes, seriously to spend time with her family. As I wrote in January, her departure was a major loss for Microsoft, according to senior executives there, and it was also a case of a powerful woman asking, “Why kill myself and miss my kids growing up?”

Now Elliott, who spent 22 years at IBM (IBM) before moving to Microsoft and heading the $8 billion Worldwide Public Sector unit there, has finished her hands-on familial gig and hasn’t taken long to find a new one back in the business world. Today, Juniper Networks (JNPR) announced that Elliott is coming on board in a new position crafted for her: EVP of Strategic Alliances.

Elliotts’s friends and former colleagues aren’t surprised. She and Juniper’s CEO, Kevin Johnson, have known each other for two decades, going back to their stints together at IBM and Microsoft. In fact, Elliott says she remembers the day 17 years ago when Johnson walked into her IBM office and told her he was leaving to go to upstart Microsoft. He asked her if she would take him back if he screwed up. Little did Johnson know — or Elliott either — that he would rise to head Microsoft’s biggest business, Windows, and one of its toughest, search.

For a decade, Johnson tried to hire Elliott at Microsoft. But she was a bleed-Blue loyalist. Caving in 2001, she flew from Connecticut to Seattle on September 10. Her first day at Microsoft was 9/11. Between running the company’s enterprise business in the Americas, co-heading the Americas organization, and leading the global Public Sector, Elliott handled some of Microsoft’s largest customers–which include countries and government agencies.

After she left in January, she followed the advice of a good friend: She didn’t take headhunter calls for two months. “I wanted and needed this break with my daughter,” Elliott, 53, told me in an email today. But the phone didn’t stop ringing, and eventually she considered CEO positions at start-ups, a president post at a Fortune 500 company,and COO and EVP jobs at several tech companies.

The only thing that really excited her was working with Johnson again. “He’s an exec who cares about the whole person,” she says — and he proved his worth by agreeing to put in Elliott’s Juniper employment contract that she’ll be able to go to the Fortune Most Powerful Women Summit. That’s the annual confab that I chair, and yes, I was shocked when Elliott told me that this event is so important to miss.)

Also in Elliott’s new contract: permission to participate in the annual Fortune – U.S. State Department Global Women Leaders Mentoring Partnership. This is a program that brings rising-star women from developing countries to shadow American women who participate in the MPWomen Summit. Since we launched the program in 2006, Elliott has been one of the program’s most supportive mentors.

So Johnson has lured Elliott to Silicon Valley by tailoring the job to her. The other clincher, she says: Juniper values partnerships. “I mean really values them, like it’s in their DNA,” she says. Elliott will hit the ground running and work to fortify the networking giant’s existing partnership with Nokia (NOK), Siemens (SI) and IBM.  Actually, she’s hard at work already. When I checked in with her earlier today, she was on the road with Johnson, visiting a Fortune 500 giant and trying to strike another major alliance. — Pattie Sellers

The ouster of Bank of America’s (BAC) chief risk officer, Amy Brinkley, was inevitable, as I wrote in “Behind the shakeup at BofA” on Friday.

And as I mentioned in that piece, two years ago, Fortune featured Brinkley and five other execs in “One Step Away,” about rising-star Most Powerful Women on track to be CEOs of Fortune 500 companies someday. So what’s happened to the other five?

One woman made it to the top: Ellen Kullman became CEO of DuPont in January.

Avon (AVP) President Liz Smith is on track to succeed Andrea Jung as CEO there.

Schering-Plough pharma boss Carrie Cox will soon be working for Merck (MRK), pending its  $41 billion acquisition likely to close in the fourth quarter.

And the other two women in “One Step Away”? They’re off the career ladder, like Brinkley. Morgan Stanley (MS) co-president Zoe Cruz has been on the sidelines since John Mack booted her in late 2007. As at BofA, her dismissal was a case of a CEO taking out a top deputy over serious risk-management problems.

Meanwhile, Susan Arnold’s opt out was voluntary. When the Procter & Gamble (PG) President quit her post last March, one day after her 55th birthday, she did it to take back her life. As for returning to a big corporate job, who knows? She’s not deciding yet, she told me. Meanwhile, she’s staying in the game by serving on the boards of Walt Disney and McDonald’s.

Here’s the reality: In this stressful environment, more and more top business women are questioning the worth of their careers. Last month came a retirement announcement from one of Wal-Mart’s (WMT) most senior women, Linda Dillman, at the top of her game. Dillman, EVP of Benefits and Risk Management at Wal-Mart, never lusted for big titles. I bet she’ll return to her roots: information technology.

Another veteran of Fortune’s Power 50 list, Sue Hellmann, recently quit her job as president of product develepment at Genentech to become Chancellor of the University of California, San Francisco.

More and more women are making big life choices. Because real power is being able to choose. That’s a point that Claire Shipman and Katty Kay write about extensively in their new book, Womenomics.

By the way, I hear that Amy Brinkley is doing okay. She certainly isn’t proud of failing to keep BofA well-capitalized and sturdy. But she’s part of a sweeping reorg there, and more change will come as CEO Ken Lewis fights to keep control. It may be small comfort, but there’s less shame in losing your job now than there has been in our lifetimes.

“Every time you celebrate an achievement, be thankful to those who made it possible.”

–Steven Chu, U.S. Secretary of Energy, in his address to Harvard grads Thursday. Chu encouraged students to give a shout out to parents, friends and inspirational professors. “Especially thank the other professors whose less-than-brilliant lectures forced you to teach yourself. Going forward, the ability to teach yourself is the hallmark of a great liberal arts education and will be the key to your success.”

Chu compared the structure of his speech to a “classical sonata.” The final movement was a plea for the new crop of Crimson alum to take on the threat of climate change. “As our future intellectual leaders, take the time to learn more about what’s at stake, and then act on that knowledge. As future scientists and engineers, I ask you to give us better technology solutions. As future economists and political scientists, I ask you to create better policy options. As future business leaders, I ask that you make sustainability an integral part of your business.” Music to our ears. –Jessica Shambora

I’ve been studying women and power since the mid-’90s. And as I’ve learned, women leaders think about power very differently from the way men do.

Power, to most women leaders, is horizontal — about influence across many areas. The careers of successful women tend to be less vertical than a ladder — more like jungle gyms. Many women I know who have reached the top — the top 50 in business, according to Fortune’s annual Most Powerful Women list — have moved laterally, even moving down a notch, to broaden their experience. Peripheral vision is key. Smart women swing to opportunities, over here or over there — maybe after time out to raise kids and build a full life along the way.

A new book called Womenomics captures a lot of my thinking. I have nothing to do with the book, though I know Claire Shipman and Katty Kay, the co-authors. In fact, they’ll be speaking about their research and insights at the Fortune Most Powerful Women Summit this September.

Yesterday Jessica Shambora, my Postcards colleague, and I subwayed downtown to hear Shipman, who is senior national correspondent for ABC’s (DIS) Good Morning America , and Kay, the Washington correspondent and anchor for BBC World News America. They talked about why companies should work to keep women leaders: mainly, because businesses with lots of women at the top perform better. Several studies prove that.

The best stuff that Shipman and Kay shared was about how successful women behave and how smart managers respond. A few nuggets from their talk:

Time is the currency for women. “We’re prepared to trade income and status for time,” says Kay, a mother of four. Both she and Shipman, who has two children, have made that trade in their own careers, passing up promotions — even though women (and men even more) fear the public perception from ratcheting back their ambition. Sara Lee (SLE) CEO Brenda Barnes, who took her own multi-year timeout from a big job after scaling the ranks at PepsiCo (PEP), told the authors that now is a prime time to ask to work less, if you so desire. Why now? Because many bosses are looking to cut costs without laying off people. Notes Kay, “If you look at demographics, there’s a labor and talent shortage looming, so they want to keep you.”

Enlightened companies treat employees like grownups. The real forward-thinking companies encourage employees to get their work done wherever, whenever. “It’s not about face time or office time,” says Shipman. “It’s about what you produce.” She and Kay mentioned Best Buy (BBY), which “abandoned the clock” a few years ago. Giving employees the right to work on their own time and own terms — with clear targets and measurement systems to monitor them — boosted productivity dramatically.

Know yourself. As companies squeeze costs, do more with less, and pile the work — on you! — you need to know what your true value is. “Have the power to say, ‘This is what I can do for you,’” says Kay. She and Shipman lay out ways to appear as if you’re saying Yes when you’re actually saying No to an extreme assignment. Say you can’t possibly finish that report by Friday. You might tell your slave-driving CEO or supervisor: “I’m happy to take this on. I can have it to you by June 27. Do you want me to bring someone else in so we can make an earlier deadline?”

Indeed, in these stressed-out times, when most of us are questioning our jobs and our careers, it’s critical to know what you’re best at and what your priorities are. For more, check out this “Know Yourself” post that I wrote two months ago. And when you have a moment to breathe, check out Womenomics.

“You are certain to change with time and there’s a chance your bliss may evolve too. Not to worry: The skills you acquire can always be effectively redeployed.”

– Tom Freston, the former Viacom (VIAB) whose commencement speech we’ve run in three parts since Wednesday.

As we said, except for Apple’s (AAPL) Steve Jobs’ extraordinary speech to Stanford grads in 2005, Freston’s talk — which he delivered at his son Andrew’s graduation from Emerson in 2007, less than a year after Sumner Redstone fired him — is one of our all-time favorites. The speech hasn’t been circulated until now.

If you haven’t read it this week on Postcards, do check it out. In Part One, Freston sets up his life lessons by talking about his remarkable career. In Part Two, he talks about chasing your bliss and bouncing back from setbacks. Part Three is about getting a grip on the world and being curious — and staying young, no matter your age. The life and career lessons from Freston — who has moved on to work with Oprah and Bono and travel the globe — are timely today, when most of us are asking: “Am I in the right job for me, and what else might I do?”

By the way, what’s your favorite commencement speech? Let us know! — Pattie Sellers

Here’s the third and final segment of Tom Freston’s 2007 commencement speech at Emerson College. In earlier posts, Viacom’s (VIAB) former CEO shared career lessons and detailed the first two “things you’re going to want to be able to say you’ve done if ever you are called upon to impart wisdom upon the young.” Here are Nos. 3 and 4 on that list, along with Freston’s warning about what could happen if grads don’t follow his advice.

No. 3: You’re going to want to say that your passport is well worn and filled-to-the-brim with stamps and visas. Because all those exotic stamps from far away places are the kind of tattoos that you won’t regret when you’re older. Travel is the best and probably cheapest graduate school you can buy.

I learned way more from my travels than I ever did in business school. My experiences overseas gave me the self-confidence and international perspective to build MTV and Nickelodeon into global brands early on. We were the first to do that.

A good adventure can change your life – and why would you put that off? It’s too late for you people to drop out of college now, but there are still plenty of things you can drop out of: Just get on a plane and go. Travel early and travel often. Live abroad, if you can. Understand cultures other than your own. As your understanding of other cultures increases, your understanding of yourself and your own culture will increase exponentially.

We, as Americans, have so much to learn here. We have a shockingly low level of global awareness and familiarity and little idea of how the world sees us. And those disturbing facts keep getting us into a lot of trouble.

The flatter the world, the more you need to be globally attuned and conversant. And you will find that the diversity of friends, interests, and thinking that this will bring you will broaden your scope and enrich your life here at home.

Fourth and last: Forty-years from now, you DO NOT want to say you are still only listening to The Shins and Arcade Fire, or LCD. To do that, you must very consciously maintain your curiosity, broaden your interests and continue to follow the cultural flow wherever it goes. Refuse to get too comfortable with what you already know. People’s tastes and attitudes tend to freeze up in their late ‘20’s. There are plenty of people my age whose cultural preferences were cryogenically sealed in 1974. It’s amazing and it’s not pretty. Many guys my age are still exclusively rocking out to Foghat.

What I have seen over my many years in the media and entertainment business, where I know a lot of you are headed, is that the most successful people – writers, executives, whatever – have many interests, an encyclopedic knowledge about them, and an undying curiosity about social trends and the endless parade of “next new things.”

They are always growing.

So my advice to you: Stave off obsolescence and prolong adolescence. Stay a young thinker. Read, listen to and watch everything you can. Explore the corners of popular culture and the arts. And, of course, these days you have to stay maniacally plugged in to the cutting edge of whatever technology is taking your profession into the future – otherwise you’re toast.

I know you just got done cramming for finals. But most of what you have to learn in life is yet to come. At Emerson you have been immersed to your eyeballs in the mix of today’s culture, and you have all thrived. But it will become increasingly hard to maintain that edge as you get older. Your responsibilities pile up. But learning is never the wrong choice…those who stop learning are the only people who really ever grow old.

Now, I don’t want to scare you but these guidelines I offer are to be ignored at your own peril. If you don’t show maniacal passion for something, if you don’t immerse yourself fully in the world by traveling or living abroad, if you don’t stay curious, if you never change your mind or develop a healthy sense of self-awareness, there is a real danger that you might end up as the President of the United States. [Bush was President when Freston delivered this speech.]

But if you take this very basic advice to heart – to follow your heart and never settle for less, to reincarnate when necessary, to live on our whole planet and revel in all of it and to keep learning always – maybe you will have the kind of career and life that no guidance counselor could have predicted for you.

And maybe, 40 years from now, you will find yourself at a commencement podium passing along the wisdom you acquired. And, if you are especially blessed, you will look out into that sea of graduates and see your own son or daughter in cap and gown.

So, Class of 2007, congratulations on all your hard work. You should feel very proud. Enjoy your accomplishments today and prepare for the great ride that starts tomorrow. Relax – you’re gonna be OK. The fun is just beginning. Best to you always and Godspeed!

For more on Freston, read Pattie’s exclusive profile in the February 16 issue of Fortune, “The Most Wanted Man on the Planet.” Freston built MTV and rose to be CEO of Viacom, only to be dumped by Sumner Redstone, Viacom’s chairman, on Labor Day 2006. More recently he’s been trotting the globe –Afghanistan, Burma, Rwanda; helping Oprah build her new TV network, OWN; and joining U2 frontman Bono on his mission to reduce global poverty and AIDS.

Here’s part two of Tom Freston’s 2007 commencement speech at Emerson College. In yesterday’s post, the former Viacom (VIAB) CEO shared the story of the sudden turn in his storied media career. Here Freston explains the first two things “you’re going to want to be able to say you’ve done if ever you are called upon to impart wisdom upon the young.”

One. First and foremost: You’re going to want to be able to say that – “but for Joseph Campbell, my life would have been one of quiet desperation.”

And if you don’t know who Joseph Campbell is, don’t worry, I am about to tell you. For those of you who have not read his books or don’t watch a lot of PBS, he was a scholar, philosopher-guru, and the author of the Power of the Myth who famously pleaded with students to “follow your bliss.”

I am under no illusion that anything I might tell you could improve upon that. He believed that by pursuing the thing you love, you actually put yourself on the path that has always been intended for you and that you were therefore destined to succeed on that path.

Boy, there is so much truth in that! And sadly, most people never get this guiding principle. I had my first Joseph Campbell moment on the deck of a houseboat floating in Kashmir, India. I was on the tail end of my year-long travel odyssey, still tormented with the question “What would I love to do?”

Advertising had not been it. This time I did not want to settle for anything less than true love. It was such a beautiful evening and, looking out upon the incredible landscape, my bliss revealed itself to me: I loved India! I felt so alive there. Even though I was just a kid from Connecticut who had arrived on the subcontinent practically by mistake, I felt this strong connection to the people. And somehow I was certain I wanted to make a life there.

It seemed to offer everything I needed. Also, as luck would have it, the recent introduction of the 747 and low air-freight costs created all kinds of exciting import-export opportunities to explore. I took it as a sign.

Now, in choosing Emerson and being more focused, most of you are closer to your “bliss” than your average graduate at other colleges. Use that advantage to your maximum advantage. You’re at a place in your life where you can do any of a million things, but find what you can do better than anyone else. You may have to bob and weave a bit — and you may find yourself waiting tables at some point — but never settle for less than what you love.

Everything good in your life will spring from this. Talent is the gift God gave you and you have spent the last 20 years making that gift your own. Each of you was lucky to receive it and from here on out, the harder you work, the luckier you will become. Only true love can fuel the hard work that awaits you. When Joseph Campbell said to follow your bliss, I’m sure he meant: Don’t walk after it, but run.

So be prepared to sweat.

Two. You’re also going to want to say your path included a couple of sharp left turns. Or even better yet, an illegal U-turn.

Asia, travel and entrepreneurship, as it turned out, were just the first in a series of blisses for me. As you may or may not have learned about love by now, sometimes you change your mind and other times, someone changes it for you. Then what?

I came home from India only to be professionally reincarnated. It was a big blow to me, but I methodically sought out another “bliss” of mine: music. It was something I knew a lot about, cared a lot about, and had a passion for. Knowing I had transferable skills from my last career, I sold my entrepreneurial track record to a young outfit that needed entrepreneurs, MTV.

People often say that a bad event is a “blessing in disguise.” Trust me, experience will teach you that some are unbelievably well disguised. Everyone gets fired, or decides to make a radical change at some point. Everyone suffers setbacks. Bad days await you, I can promise you that.

But as careers unfold, you might just find you have another “bliss…and it’s OK.” You are certain to change with time and there’s a chance your bliss may evolve too. Not to worry: The skills you acquire can always be effectively redeployed. You will look back on setbacks and be grateful for a catalyst that came not a moment too soon.

Look at Al Gore. He won an election for the Presidency, only to immediately be told that, actually, there was a mistake and he wasn’t President after all. He got fired before he was even finished being hired. But look at what he’s accomplished since then: working hard to save a planet, for God’s sake, and even winning Academy Awards. Not to mention that he also guest-starred on Futurama. Now that’s an inspirational career adjustment!

Tomorrow, the third and final segment of Tom Freston’s speech: two more mandates for life, and a warning about what could happen if grads don’t follow his advice.

For more on Freston, read Pattie’s exclusive profile in the February 16 issue of Fortune, “The Most Wanted Man on the Planet.” Freston built MTV and rose to be CEO of Viacom, only to be dumped by Sumner Redstone, Viacom’s chairman, on Labor Day 2006. More recently he’s been trotting the globe – Afghanistan, Burma, Rwanda; helping Oprah build her new TV network, OWN. He’s also working with U2 frontman Bono on his mission to reduce global poverty and AIDS.

Two more Most Powerful Women — the latest, both named Linda — are leaving big companies.

One is Royal Dutch Shell’s (RDS.A) Linda Cook — whose exit lends fresh meaning to the term “leaky pipeline.” Cook, executive director at the Anglo-Dutch oil giant and No. 3 on Fortune’s 2008 international Most Powerful Women list, will leave next Monday after losing the CEO race there, according to the Wall Street Journal. Strangely, the New York Times this past Sunday ran a first-person piece by Cook, 50, about her unlikely career path. She grew up in Kansas, was one of few women in engineering, and early on bunked with the boys in a mud loggers’ trailer to get the job done at Shell.

And the other Linda who is leaving? That’s Linda Dillman of Wal-Mart (WMT). EVP of Benefits and Risk Management and a multi-time star on Fortune’s Most Powerful Women list, Dillman is departing the world’s biggest retailer at the end of July. Yes, her exit is surprising — and not. In 2003, Dillman told me that she questioned every promotion she got. “Promotions have come to me before I felt I was ready,” she said. In 2002, when she was offered the CIO job at Wal-Mart, she replied, “Tell me what you’re going to do if I don’t take the job.” The higher-ups persuaded her to accept the post.

Dillman, who isn’t speaking publicly about her latest move, apparently wants to return to her roots: technology (and in her current lofty post, she wasn’t doing what she loved). Given her recent experience in benefits and HR, some people think she might move into HIT — health information technology. Hmm, maybe General Electric (GE), which is expanding aggressively in that area, would have an interest in Dillman.

Like a lot of accomplished women, Dillman defines power broadly — with a global view: Over the years, she’s been a standout mentor in the Fortune/U.S. State Department Global Women Leaders Mentoring Partnership. Dillman’s 2009 mentee, Wilma Judish Appenteng, just returned to Ghana after spending three weeks in Bentonville, Arkansas. The folks in Bentonville and the star manager from Ghana, I’m told, opened each other’s eyes to the world.

Where in the world is Gerry Laybourne? Last we heard, she sold Oxygen Media for almost $1 billion to General Electric’s (GE) NBC Universal. The media-industry icon, who had built Viacom’s (VIAB) Nickelodeon before creating Oxygen, has been notably quiet since her mega-sale in the fall of 2007.

In fact, I didn’t know what Laybourne was up to until last week, when I ended up at her apartment on the Upper West Side of Manhattan. Reason I was there: Laybourne invited the participants in this year’s Fortune/U.S. State Department Global Women Leaders Mentoring Partnership for idea-sharing on a variety of topics—business-building, creativity, women and power, the state of the universe. Each May, Laybourne meets with the mentees — rising-star women from across the developing world who come to the U.S. to shadow participants in the Fortune Most Powerful Women Summit. Every May, the mentees say that meeting with Laybourne is one of the highlights of their month-long U.S. visit.

So this year I went to the Laybourne powwow — and as I admitted to her last week, I went partly to find out where in the world she’s been. “India, Bhutan, the Amazon—places I never had time to go to,” Laybourne told the 32 women from across the globe. One of her favorite trips was to Namibia, she said. That’s home to two of this year’s 32 mentees.

Laybourne really sounded liberated to be out of a job. “I’m happy to be a broader global citizen than I was when I was a grunt of a businesswoman and had time [during a trip] only to go to the hotel or to the meeting.”

Not that she’s abandoning her career forever. Now is prime time for women leaders, she contends. “Men’s brains are bigger, but we have more pre-frontal cortex, so we make connections better.” And connections — collaborations, partnerships, joint ventures — are more critical to business and politics than ever.

So is being adaptable, since today more than ever, who knows what tomorrow will bring? Women may have an edge in that respect. “We keep a lot of open folders in our minds, which is why we drive men crazy,” she told the group. “I joke that Steve Jobs is part woman because he has such an intuitive way of thinking about things,” she said, professing her admiration for Apple (AAPL). (She’s an Amazon (AMZN) fan too. Loves her Kindle.)

Laybourne noted two areas where women aren’t too adept. “One is tooting your own horn,” she said. “Women are slaves to facts and don’t take risks as readily and trust their intuition.” She felt her own intuition blocked at Disney (DIS), where she spent a couple of years pre-Oxygen and felt that centralized control and over-analysis of ideas hampered creativity. “Eighty percent of business decisions get made on intuition,” she ventured.

Laybourne is trusting her gut — yes, her intuition — to lead her to her next gig. She wouldn’t say what it might be, but clearly she’s thinking about government as well as business. “I’m very excited by the Obama Administration,” she said, citing education, health care and infrastructure as three areas that particularly interest her. She has a screen saver on her computer that shows all the U.S. Presidents — 43 white guys — and then Barack Obama. “It’s a beautiful image,” she said. “I have so much hope, I can hardly stand it.”

Watch for Laybourne to reemerge. For a woman who wanted to be a city planner, became a teacher and then an entrepreneur, and ended up as one of the media world’s great pioneers, the world is open to her.

“Betting on the Future.” That’s the 2009 theme of Fortune’s Most Powerful Women, who convened in New York City last evening for a mega-celebration and some very smart conversation. I’m not sure I belong on stage with three superstars under 40: Bank analyst Meredith Whitney, Google’s (GOOG) Marissa Mayer, and Goldman Sachs’ (GS) Dina Powell. But there I was (at age 49), talking with them them about how they’ve navigated their careers and how they view the future.

It was an insanely inspiring evening, thanks also to 32 young women from 23 developing countries. This happened to be the last night in the U.S. for these participants in this year’s Fortune/U.S. State Department Global Women Leaders Mentoring Partnership. These international women are nominated by the State Department’s embassies in developing countries and chosen by Fortune to shadow American women leaders each May. Some of this year’s mentors — including Time Inc. (TWX) CEO Ann Moore, Fidelity Personal Investing president Kathy Murphy, American Express (AXP) execs Joan Amble and Susan Sobbott — were with us last evening.

So were plenty boldfaced names: Tina Brown, Nora Ephron, CNBC’s Becky Quick, CNN’s Christiane Amanpour. My Postcards colleague Jessica Shambora sat beside Sheri McCoy, Johnson & Johnson’s (JNJ) Worldwide Pharmaceuticals chairman, who is No. 44 on Fortune’s Most Powerful Women list.

A few Best Moments from the evening:

Best Career Lesson: Mayer, Google’s vice president of search products and user experience, talked about juggling 14 job offers after she graduated from Stanford. She interviewed with Google founders Sergey Brin and Larry Page and guessed that their start-up had “a 2% chance of succeeding,” she said. But she also figured, “I’ll learn more failing at Google” than succeeding at a well-established, stuck-in-its-ways company. She took a risk, And look at where it got her. At 33, Mayer is the youngest person ever to make Fortune’s Most Powerful Women list.

Smartest Industry Outlook: Meredith Whitney, who is No. 35 on our MPWomen list and made Fortune’s cover last August, said that more banks will fail as the economic recovery stumbles and some giants fail to adapt. The survivors: nimble companies that revamp their business models. One that she bets will succeed: American Express. (Click here to see Whitney talking with CNNMoney’s Poppy Harlow.)

Most Dynamic Duo: Gayle King, O magazine editor at large and Oprah Winfrey’s best friend, who brought as her “rising star” guest her daughter Kirby. A 23-year-old Stanford grad, Kirby Bumpus is pursuing her Masters in Public Health — and this summer doing an internship with teens in Harlem, teaching them about sex education.

Most Moving “Greatest Mentor” tribute: Rica Rwigamba, who runs an eco-toursim company in Rwanda, spoke about her mother and drew tears and standing ovations. This charismatic entrepreneur, who was one of the 2009 mentees, told a story about her mother returning to Rwanda after the country’s genocide and finding a new home for her husband and children. After Rika’s tribute, CNN”s Christiane Amanpour, sitting beside her, talked about her “Greatest Mentor.” She started by citing the remarkable success of women in a revived Rwanda today: Women hold 56% of the seats in Parliament. CNN’s chief international correspondent segued into a tribute to her mentor: Ted Turner, who built CNN.

Best Party Crasher: Cecilia Attias, who divorced French President Nicholas Sarkozy in 2007, remarried and has moved to Manhattan. She came with Jocelyne Attal, the former CMO of Avaya who now has her own marketing firm, JAgency. Surprise! Attias’s arrival was particularly dicey since the only dinner seat we had for the former First Lady of France was at a way-in-the-back table. Frantically, we tried to make the necessary switches. We couldn’t do it in time before everyone was seated. I have to say, Attias was lovely and most gracious. She thanked us and said she was thrilled that we were able to accommodate her.

We were happy to have her with us…along with 180 other extraordinary women who define power broadly and reach out globally to try and make the world a better place.

Stay tuned to Postcards for video from the evening. Meantime, have a good weekend!