The thing I really care about is the mission, making the world open.

Stuff like photos and events and groups - we've built pretty basic versions of those apps to start but they ended up being so much more used because of their social integrations.

I would only hire someone to work directly for me if I was willing to work for that person.

People wait until late in their career to give back. But why wait when there is so much to be done?

There are social restrictions where someone could be suppressing someone else's freedom to express themselves.

It only took me two weeks to build the first version of Facebook because I had so much stuff before then.

For the first time we're allowing developers who don't work at Facebook to develop applications just as if they were. That's a big deal because it means that all developers have a new way of doing business if they choose to take advantage of it. There are whole companies that are forming whose only product is a Facebook Platform application.