In 2005 Google bought the popular mobile social networking service Dodgeball, which it then let fester, adding no new features or improvements. Frustrated with the lack of support from Google, the founders quit, giving notice in their now infamous thumbs down photo. On March 6th Google finally pulled the plug on Dodgeball.
Dennis Crowley, one of the co-founders of Dodgeball, has returned launching a new and improved version of Dodgeball called Foursquare. The user interface is much better, a gaming aspect has been added where users can unlock achievements and there is now an iPhone app that goes along with the service. Foursquare also integrates with Twitter, which rose in popularity as Dodgeball languished.