Foursquare takes lead in where-am-I apps
One year ago, the founders of Foursquare stepped onstage before a tech-savvy crowd in Austin, Texas, to announce their concept: a smartphone app that lets you tell friends where you are.
Now, as Foursquare's entrepreneurs head back to the South by Southwest Interactive (SXSWi) festival, they've hit a half-million users of their buzz-creating mashup of social networking and mobile games.