-
Facebook, Twitter, Foursquare Face Off in Location-based Services
If you’ve ever used one of the Location-based apps like Foursquare, Gowalla or Brightkite, you’ve gone through the steps of checking in to a location to earn some sort of reward for being there. Now that these early-stage start-ups have proven the interest in Location-based Services, Twitter and Facebook want in (joining Google, Apple and…