In March 2009, Foursquare's founders journeyed to Austin, Texas, to announce their concept: a smartphone app that lets you tell friends where you are. A year later, their location-based networking service is catching on. http://feeds.feedburner.com/~ff/rss/...?d=yIl2AUoC8zA http://feeds.feedburner.com/~ff/rss/...?d=7Q72WNTAKBA http://feeds.feedburner.com/~ff/rss/...BY:V_sGLiPBpWU http://feeds.feedburner.com/~ff/rss/...?d=qj6IDK7rITs http://feeds.feedburner.com/~ff/rss/...BY:gIN9vFwOqvQ
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