Dennis Crowley -- the 33-year-old co-founder of a popular app called Foursquare -- is trying to turn boring adult life into a playful and adventurous game. It's a quest he's been working on since childhood.http://feeds.feedburner.com/~ff/rss/...?d=yIl2AUoC8zA http://feeds.feedburner.com/~ff/rss/...?d=7Q72WNTAKBA http://feeds.feedburner.com/~ff/rss/...UU:V_sGLiPBpWU http://feeds.feedburner.com/~ff/rss/...?d=qj6IDK7rITs http://feeds.feedburner.com/~ff/rss/...UU:gIN9vFwOqvQ
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