Pete Cashmore: Early adopters say Foursquare could be 2010's big social-media craze
Birthed by the team that brought us the mobile social network Dodgeball (acquired by Google in 2005 and later shuttered), the location-based mobile startup serves a simple purpose: It lets an individual share his or her location with a group of friends.
Foursquare ventures beyond utility, however: It's a virtual game in which participants earn badges for checking in at various locations; those that check in most become a venue's "mayor." By all accounts, this mechanism is as addictive as Twitter, Facebook or checking your e-mail on a BlackBerry.
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