Venture Capitalists Explain Foursquare's Juiciness, Join Sharing Revolution They've Funded

Foursquare has, as rumored, raised a chunk of venture cash that'll let it expand its business significantly, and fast too. But what exactly is so hot about this hot-topic location-based game tech? Unusually we have VC insight on the matter. 

We'd heard about the rumors last week, and they were immediately interesting as Foursquare seems to be busily rocketing to success in the location-based "check in" game that's got many a smartphone-owner playing along. Foursquare's business model is a...