If you've ever asked yourself on a Saturday night "Where is everybody?", then you'll be tickled to meet Citysense. The new service is currently alpha-testing in SF and uses "a billion points of GPS and WiFi positioning data" to relay real-time graphics of the city's hotspots straight to your Blackberry (and eventually iPhone). It's the ultimate in sheep mentality. [Citysense via Thrillist]
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