Foursquare Day Atlanta, Jim Caruso, @jimcaruso, What is Foursquare?

Foursquare is a social network that lets you "check-in" to places you visit and can also post to Twitter and Facebook, identifying friends that are also checked-in with you. It is among the Location Based Services (LBS) that use the GPS (Global Positioning System) capabilities of smartphones to connect friends and introduce the like-minded, social media obsessed.