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.

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

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

As I was getting interviewed by the Wall Street Journal, or some big pub guy, all I remember was that he went off to the bathroom for a second, and they brought out my omelet. The next thing I remember, I woke up, and I was on the side of my own omelet, and there was no one at Buck's. Everyone was gone. They just let me sleep.

If you're building a social product, you're still living in the last century if your product doesn't work on Facebook.

Think of Slide as a giant media network for people to transmit information. The content that's in there now has been provided by users - it's whatever they want it to be.

The world is now awash in data and we can see consumers in a lot clearer ways.