Social location service Foursquare continues to grow rapidly, reporting its 100 millionth check-in yesterday. The company only passed the 40 million milestone this April. Foursquare recently closed a big round of funding, opting to fend off acquisition interest from Yahoo (among others). The question now is whether the service can continue its growth, work more with brands and build a viable business model.
Social location service Foursquare continues to grow rapidly,
