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.

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

Amazing what people make up based on what they choose to see.

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

Twitter is the world.

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

The first complaint we hear from everyone is: 'Why would I want to join this stupid useless thing and know what my brother's eating for lunch?' But that really misses the point because Twitter is fundamentally recipient-controlled - you choose to listen and you choose to leave. But you also choose what to put down and what to share.