I said a long time ago that Foursquare can make cities better. You have these augmented realities like Foursquare and Twitter and Facebook that provide these virtual nodes and instant feedback from anywhere, adding annotation around a physical places.

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.

I am someone who tweets about what I have for breakfast, what I have for lunch, what I have for dinner, and for 99.99999 percent of the world, it's useless. It's meaningless. But for my mother, she loves it.

What I love about New York is just the electricity I feel right away.

My goal is to simplify complexity. I just want to build stuff that really simplifies our base human interaction.

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

There's an entire universe in every single tweet, and it all really depends on the content as far as how it's going to spread.