FourSquare is a rapidly growing social networking application for Windows Phone 7 that precedes Google Buzz. The app was recently demo’d at the MIX10 (an assembly Microsoft developers, designers and geeks).
While FourSquare is already released for Windows Mobile 6.x, the new version for WP7S has impressed developers because “it just works”. FourSquare has the highest growth rate for any social networking application to date.
