LESLEY STAHL: If you have a Facebook account, you've probably reconnected with an old pal, shared photos with your family, and gotten advice from your friends on what to buy and what to read. It's pretty likely you logged on today.

Lately, the social networking site has been introducing new products - one after the next - with the goal, it seems, of turning the entire Web into one big social network, so eventually the Internet will be Facebook.

As if the company wasn't surging enough, the movie "The Social Network" about the creation of Facebook has heightened interest, especially in its 26-yr-old CEO, Mark Zuckerberg.

Now Facebook is about to get a facelift, and agreed to launch its new look on "60 Minutes."

Correspondent Lesley Stahl went out to Palo Alto, Calif. and sat down with Zuckerberg to discuss his creation, which is used today by a whopping 500 million people in 70 languages all around the world.

***

STAHL: When you first thought about this, 19 years old, is this what you had in mind? Did you see this far into the future? Or is it way beyond what you dreamed?

MARK ZUCKERBERG: Well, it's funny. When I was getting started, with my roommates in college, you never think that you could build this company or anything like that, right? Because, I mean, we were college students, right? And we were just building stuff 'cause we thought it was cool. I do remember having these specific conversations with my friends where we thought, you know, someone is gonna build this. Someone is gonna build something that makes it so that people can stay connected with their friends and their family, but no way would we be the ones who were contributing to, kinda, leading the whole Internet in this direction.

STAHL: But that's what he's doing - leading the whole Internet in his direction. In a non-descript T-shirt at a non-descript desk, Mark Zuckerberg runs a vast global empire with the world's largest population after China and India.

I first met him three years ago, at Facebook's old graffiti'd building in downtown Palo Alto. The company has since decamped to giant hangers nearby to accommodate their explosive growth. The graffiti is largely gone, except for one word you just can't miss.

STAHL: I see 'hack' everywhere: Hack. It has a negative connotation, doesn't it?

ZUCKERBERG: When we say hacker, there's this whole definition that engineers have for themselves, where it's very much a compliment when you call someone a hacker, where to hack something means to build something very quickly, right? In one night, you can sit down and you could churn out a lot of code, and at the end, you have a product.

STAHL: Which is what he expects from his 500 engineers. As we walked through, we got a sense of high-level competition, whether it's writing code into the night or taking breaks to play speed chess. It's a constant game of one-upmanship.

STAHL: You have "hackathons."

ZUCKERBERG: Yeah. Hackathons are these things where just all of the Facebook engineers get together and stay up all night building things. And, I mean, usually at these hackathons, I code too, just alongside everyone.

STAHL: As he spoke, I remembered his awkwardness from three years ago, and how he rarely blinks. But he's far more relaxed now, easier to smile, and noticeably more confident, as he tells you about all the new products they keep launching.

STAHL: You're showing us something that no one else has seen yet.

ZUCKERGERG: Soon.

STAHL: Very soon, starting tomorrow. Tomorrow, the company will launch a new layout for the heart of the site: every user's profile page.

For example, this is Mark's old page is filled with scrapbook-like entries in no order of importance, like "Andy Samberg plays me on Saturday Night Live."

You have to dig around to get any real sense of who Mark is as a person. This is Mark's new page, which is in effect the "Mark Zuckerberg Story" or how he wants his friends to see him. His bio information is right up top, with the kind of details he'd tell you if you met him, say, at a bar.

ZUCKERGERG: I work at Facebook and I spend all of my time there, right? I mean, here are my friends. I grew up in New York and now I live in California, right. Those really kind of basic, important things.

STAHL: Under the bio are the latest photos posted by him or his friends. It's like a running ticker tape of his life. Every day, a staggering 100 million photos are uploaded on to the site.

STAHL: Lots of photos, right away.

ZUCKERGERG: People love photos.

STAHL: Yeah.

ZUCKERGERG: Photos originally weren't that big a part of the idea for Facebook, but we just found that people really like them, so we built out this functionality.

STAHL: A dozen engineers and designers worked on the new layout in a war room. Empty plates and toothpaste tubes by their keyboards. They raced against a real countdown clock, right there, telling them how much time was left to complete each high priority task.

EMPLOYEE: We want it to be awewsome.

STAHL: They came up with new section on the left where you can now list the important people in your life: mom, dad, sister, sister, sister, girlfriend. Another new feature, pulls up a history of your relationship with any of your Facebook friends.

ZUCKERGERG: You can see all the things that you have in common with that person. And it gives you this amazing connection with that person in a way that the current version of the profile that we have today just doesn't do.

STAHL: For the over-sharers among us, you'll still get the news. "Mark just ate an extremely spicy pepper and went to the Harry Potter amusement park with his dad." There's lots more graphics under "What's important to you." Mark likes Lady Gaga and epic movies; and finally, there's a sports section. He plays tennis, and likes the Yankees.

But whenever Facebook introduces something new, there are always questions about how it protects our personal data.

STAHL: There's a sense that you, after all this time, aren't always aboveboard, and that there's some hidden motive to, kind of, invade our privacy, take the information and use it to make money.

ZUCKERGERG: We never sell your information. Advertisers who are using the site never get access to your information.

STAHL: But the new layout does encourage us to reveal more about ourselves on Facebook. Earlier this year, the company also introduced a new button, where users can tell Facebook what they "like" in over 100,000 sites: whether it's a new pair of jeans, or a "60 Minutes" story.

So the company does compile and control an ever-growing inventory of your likes and interests, and if Facebook itself doesn't sell the information to advertisers, applications (or apps) that run on Facebook by outside companies have been known to.

ZUCKERGERG: It's against all of our policies for an application to ever share information with advertisers.

STAHL: But they do. They do.

ZUCKERGERG: And then, we shut them down if they do.

***

STAHL: Kara Swisher is the editor of "All Things Digital," a Web site about high tech in Silicon Valley.

STAHL: You know, I wonder if Facebook can exist if it doesn't invade privacy.

SWISHER: That's right. That's exactly right.

STAHL: So it needs to invade privacy. The issue is transparency, isn't it?

SWISHER: Kind of, yes.

STAHL: How up front they are with the users