Foursquare was founded by Dennis Crowley and Naveen Selvadurai.
Foursquare is a location-based social networking website and game.
Foursquare is built primarily for smart phones.
Foursquare has more than 600,000 people checking in at this moment in time.
Foursquare grew more than 10% during one conference (SXSW). That hasn’t been done since Twitter.
Foursquare employ 16 people. The square root of 4 is 16… See what they did there?
If you want to know more, check out their blog.