The greatest lesson that I learned in all of this is that you have to start. Start now, start here, and start small. Keep it Simple.

My mom cares that I tweeted a picture of my breakfast. She's knows I'm eating and I'm safe.

I loved couriers. You had this transfer of physical information happening throughout the city and the world. Someone picking up the package, putting it in a bag, going somewhere, taking it out of the bag, giving it to someone else. I thought that was so cool. I wanted to map it, to see that flow on a big screen.

It's empowering to be asked to look at what's possible, not told how to do it.

TweetDeck is a very interesting client, because it presents a view that no other client in the world presents, which is this multicolumn, massive amounts of information in one pane. And people really, really enjoy that.

The interesting products out on the Internet today are not building new technologies. They're combining technologies. Instagram, for instance: Photos plus geolocation plus filters. Foursquare: restaurant reviews plus check-ins plus geo.

Great companies don't just have one founding moment. They have many founding moments.