I think I've grown and learned a lot.

Look at the way celebrities and politicians are using Facebook already. When Ashton Kutcher posts a video, he gets hundreds of pieces of feedback. Maybe he doesn't have time to read them all or respond to them all, but he's getting good feedback and getting a good sense of how people are thinking about that and maybe can respond to some of it.

If you just work on stuff that you like and you're passionate about, you don't have to have a master plan with how things will play out.

The companies that work are the ones that people really care about and have a vision for the world so do something you like.

People can be really smart or have skills that are directly applicable, but if they don't really believe in it, then they are not going to really work hard.

If Facebook were a country, it would be the 8th most populated in the world, just ahead of Japan.

With some of the issues around the Snowden leaks and what the NSA was doing I think have scared people around the world and I think in many ways rightfully so.