Right now, nearly all the apps on Facebook take a week to build. No more.

If I see what you're up to on Facebook but I don't see your updates on Flickr, I'll still care about Facebook.

You can have successful teams where people hate but deeply respect each other; the opposite (love but not respect among team members) is a recipe for disaster.

Facebook is so ubiquitous now that it's like another manifestation of the web itself.

If the game designer produces more content than he can consume per month, some fraction of the people will say more quests, more tests, more challenges, more whatever, and they will be compelled by it.

You're going to pull out your phone and try to use whatever is the most appropriate app on your iPhone or your Android device. Yelp saw that very early on. And when we launched the mobile product, we saw immediate growth, and we were stunned.

Right now, nearly all the apps on Facebook take a week to build. No more.