Steve Jobs is Fortune’s “CEO of the Decade.” As my colleague Adam Lashinsky says in the current issue’s cover story, Jobs has created more than $150 billion in shareholder wealth–meanwhile, “transforming movies, telecom, music, and computing, and profoundly influencing the worlds of retail and design.”

I’ve met Jobs just once, three years ago, when he came to Fortune’s offices here in New York. I remember, he walked into our conference room in his uniform–the black turtleneck, the jeans, the sneakers–and sat down beside me. What could be cooler? For 90 minutes, he demoed a sleek little gadget that was weeks away from launch. Even the most jaded journalists were dazzled. It was the iPhone.

To help report the Jobs cover package, I walked over to Avon (AVP) and interviewed Chairman and CEO Andrea Jung. She didn’t know Jobs well until early last year when he asked her to join the Apple (AAPL) board. Now she’s the only female director, with six guys. She’s also on the board of another famous company founded by a famous creative guy: Thomas Edison. That’s General Electric (GE). So Jung has a front-row seat to how power works, and innovation as well.

Here’s Jung’s first-person take on Jobs.–Patricia Sellers

Steve called me one day two years ago and said, “I’m in the city, Can I come up to your office?” He sauntered in, wearing his black turtleneck, jeans and sneakers. He showed me the new shuffle. We had had some conversations before. I was a huge admirer of the company. There isn’t another consumer business like Apple. About six months later, I joined the Apple board.

All of us would like to think that we’re as focused on the consumer and the end-user experience as Steve is—that maniacal passion for the best phone, the best mp3 player, the best PC, the best retail experience.

Steve is singularly passionate about making products that people love and understand. He does it in a very black and white way, while the rest of the world gets caught up in the gray–or caught up in themselves. He is, on the one hand, the most simple and clear thinker. I so often think, ‘It sounds so simple.’ But he’s taking on things that are extraordinarily complex and arguably risky.

He breaks down barriers. If you have that disruptive vision, you don’t look at historical facts to make a new future.

Steve refuses to compromise on integrity or the consumer experience for the sake of commercialism. He’s laser-focused on getting it right. It’s a great lesson in this quarter-to-quarter world. I leave Apple board meetings thinking, ‘I’ve got to do a better job.’

The board is small—seven directors–smaller than most boards, including Avon’s. There is an extraordinary openness in the board room, and it’s incredibly interactive.  Any board member would feel free to challenge an idea or raise a concern.

He’s a real listener and wants your opinion. He’ll call on a Sunday—like one day he called to let me know that they redid the store in Soho and wanted to know what I thought of it. My son will look at my iPhone and say, “Steve Jobs is calling!” Not many CEOs have that effect on 12-year-olds.

I’ve been really impressed by his humility—his willingness to talk about mistakes or things that need to be corrected. Or things they wish they hadn’t done. It’s been not only gratifying, it’s been great. I feel like I’m part of history being made.

“A key Jobs business tool is his mastery of the message. He rehearses over and over every line he and others utter in public about Apple, which authorizes only a small number of executives to speak publicly on a given topic. Key to the Jobs approach is careful consideration of what he and Apple say — and don’t say. “

–Fortune’s Adam Lashinsky on Apple (AAPL) CEO Steve Jobs. Lashinsky’s cover story, “Steve Jobs: CEO of the Decade,” in the current issue of Fortune, explains how the “showman…salesman…magician…tyrannical perfectionist” redefined not just one industry, but four: movies, music, mobile phones and computing. Check out the video below for more on how Jobs did it. –Jessica Shambora

“There hasn’t been a day in Steve’s life that he doesn’t get up, think about the company he works for, or what he’s going to do next. These are things that drive him.”

–Bill Campbell, Intuit (INTU) chairman and former CEO, about Steve Jobs–Apple’s (AAPL) CEO and Fortune’s “CEO of the Decade,” on the cover of the current issue. Once Apple’s VP of marketing and now on the board, Campbell  claims he’s never seen Jobs be anything but intense. In fact, Campbell says, Jobs is so focused on creating the next groundbreaking product, he doesn’t even stop to think about what it all means. “He wants to create something that has value, that has a legacy. ‘Legacy’ is my word. I’m not sure he ever thinks about legacy. He’s just driven like that.”

More big names in business offer their reflections on Jobs here. –Jessica Shambora

“He’s involved in details you wouldn’t think a CEO would be involved in.”

–Ken Segall, a former Chiat/Day creative director who has worked with Apple (AAPL) on and off for years, talking about Steve Jobs, Fortune’s “CEO of the Decade.” Jobs commissioned the 1997 “Think different” campaign, says Segall, long before any of Apple’s new products were introduced — or even described to the ad team. “He’d say, ‘The third word in the fourth paragraph isn’t right. You might want to think about that one.’”

The new issue of Fortune, featuring a in-depth retrospective on Jobs, hits newsstands today. –Jessica Shambora

“The threshold for the release of the first product should be, ‘What would Steve Jobs do?’”

– Marc Andreessen, venture capitalist and Netscape co-founder, who often evokes Apple (AAPL)’s maestro CEO in his advice to entrepreneurs. Andreessen is quoted in the Fortune cover package, “Steve Jobs: CEO of the decade,” hitting newsstands Friday. Fortune’s retrospective of “all things Steve” includes timelines, online photo galleries, and testimonials from Jobs’ friends and colleagues. For the next week, our Power Points–the quotes we post frequently on Postcards–will be plucked from this coverage of the world-changer whose comeback is the ultimate story of redemption. –Jessica Shambora

Carly Fiorina declared her candidacy for the U.S. Senate–in a bid to replace another well-known woman, incumbent California Democrat Barbara Boxer.

Fiorina, who was No. 1 on Fortune’s Most Powerful Women list for six years when she was CEO of Hewlett-Packard (HPQ), will be pounding the campaign trail simultaneously with another ex-No. 1 on our list: Meg Whitman. The former eBay (EBAY) CEO, who topped Fortune’s power list in 2004 and ‘05, is running for Governor.

Neither woman, both Republicans, will have an easy time in the left-leaning, financially crippled Golden State. Running on her “I’m a great manager” platform, Whitman has a decent shot at her party’s nomination. But she faces a fierce Democratic rival in Jerry Brown, California’s current Attorney General who once was Governor. Another Democratic rival, San Francisco Mayor Gavin Newsom, just dropped out. (For more, check out my recent cover story, “Can Meg Whitman Save California?“)

Fiorina, who yesterday revealed her plans in the Orange County Register, has a personality tailor-made for campaigning: She’s charismatic and commanding. Remember when she was waging that brutal proxy fight to buy Compaq in 2002? She played it like a political candidate–and she won.

But Fiorina, 55, who worked with Whitman on John McCain’s failed Presidential campaign, carries significant baggage into this latest race: She was fired by the H-P board in 2005–as much for her style of leadership as her disappointing execution.

Another battle lately has been a medical one. Fiorina was recently treated for breast cancer. In September, while undergoing daily treatments at Stanford Hospital, she spoke by video-conference, along with Elizabeth Edwards, to participants of the Fortune Most Powerful Women Summit. Here’s a clip:

Kudos to Fiorina for speaking out. The fact that she’s running for the U.S. Senate is a sign that her prognosis is good. And she’s as tenacious as ever.

by Jessica Shambora

Are there green shoots of profitability in the land of social networking?

Last week Twitter announced deals with Microsoft (MSFT) and Google (GOOG) to make its posts available on the Bing and Google search engines–and this could be a reliable source of future revenue. Though as Adam Lashinsky writes in the current issue of Fortune, Twitter co-founders Evan Williams and Biz Stone are still less focused on making money than they are on doubling their user base of 55 million people.

As for Facebook, the other social-networking heavyweight, it now has positive cash flow, management says, along with 300 million users. Still, details have yet to emerge about how Facebook’s advertising buildup is faring.

But hold on, green shoots really are appearing–from companies you might not expect. One of the hottest start-ups: Zynga, a creator of games that run on social networks like Facebook and MySpace (NWSA). The company is forecasting at least $100 million in annual revenues after just two years in business. Management says that Zynga has been profitable since September 2007, just two months after launching.

San Francisco-based Zynga creates games that allow players to interact with friends in their social network. These “social games” are free to play, but users pay to purchase virtual goods. Why spend real money on virtual goods? Because the virtual goods help you advance in the game more quickly.

For instance, in FarmVille, where you tend a virtual farm, Zynga collects money when you buy fuel for your virtual tractor. The virtual tractor enables you to build a bigger farm faster than a player who doesn’t spend to invest. FarmVille happens to be the most popular social game right now. It has more than 61 million monthly users.

These social games are addictive. And while some people contend that this growing addiction is crazy, others say that buying virtual goods isn’t much different from plunking down cash for a game like Microsoft’s Halo 3. Would you spend real money on virtual goods? Let us know–and for more on social games, read my profile of Zynga in the new Fortune.

“Life is long but time is short.”

– Google (GOOG) CEO Eric Schmidt, on acting boldly and taking risks. This line—along with points about passion and vision and keeping customers first—is one of 10 lessons that author Ken Auletta says he took away from researching Google for his new book, Googled: the End of the World as We Know It. Auletta’s book is due out next week from Penguin Press.

“We are spending our time trying to create the best technology and product for as many users as possible. That’s where all our value is going to come from.”

–Twitter CEO Evan Williams in “Twitter hits tweenhood” in the new issue of Fortune, on newsstands next week and Fortune.com today. Having attracted more than $150 million in venture capital (and 55 million unique visitors monthly), Twitter has outpaced Google (GOOG) in money-raising…with meaningless revenues to show for it. But for this feat and for quickly building the communications platform into a global phenomenon, Fortune puts Williams and co-founder Biz Stone at No. 5 on its just-released 40 Under 40 list.

“You need to build your career not as a ladder, but as a pyramid,” Yahoo (YHOO) CEO Carol Bartz said in the New York Times yesterday. I wholeheartedly agree: In today’s ever more complex world, you need to build a broad experience base–with peripheral vision and a willingness to make lateral moves. If you’ve been reading Postcards, you know that my favorite image is a jungle gym. That’s kind of like Bartz’s pyramid.

You can read more of Bartz’s career advice in her first-personer, “Just Deal with it.” But it was at last month’s Fortune Most Powerful Women Summit that she spoke about public-company board work as essential to career-building and vented about the “nonsense” of CEOs prohibiting high-potential execs from serving on other companies’ boards. The Yahoo chief is colorful, as usual, as she describes her first board meeting as the new CEO of Autodesk (ADSK) in 1992, the day after she was diagnosed with breast cancer. “I didn’t even know what a friggin’ board was,” she says:

During her 14 years running Autodesk, pre-Yahoo, Bartz was on the boards of Cisco (CSCO), Intel (INTC), NetApp (NTAP) and BEA Systems–until it was acquired by Oracle (ORCL). That’s a heavy load that I’d say paid off in prepping her for Yahoo, where she arrived in January. My Fortune colleague Adam Lashinsky and I have sparred on the value of such multiple directorships. We’ll see tomorrow how well Bartz is doing. She’s due to report Yahoo’s quarterly earnings.