It's a matter of invitations versus context. Twitter is really good at providing context, like, I''m having coffee at Third Rail Coffee.' Foursquare is about invitations to places. In this respect Foursquare has started to replace Yelp for me.
Revolution looks at the intersection ahead and pushes people to do the right thing.
As CEO, my main job is editor-in-chief.
'Luck' is recognizing when the situation encourages build out and execution.
Twitter is the world.
Constraints inspire us in how we approach the press, how we approach business relationships, how we do everything.