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. http://feeds.feedburner.com/~ff/rss/...?d=yIl2AUoC8zA http://feeds.feedburner.com/~ff/rss/...?d=7Q72WNTAKBA http://feeds.feedburner.com/~ff/rss/...fo:V_sGLiPBpWU http://feeds.feedburner.com/~ff/rss/...?d=qj6IDK7rITs http://feeds.feedburner.com/~ff/rss/...fo:gIN9vFwOqvQ
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