Four Million People Around the World Are Now ‘Checking In’ on Foursquare

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Foursquare's Founders. Photo: NYM

Though it's only existed for about a year and a half, Foursquare, the website and phone app that lets users check in to tell people where they are at the moment, signed up its 4 millionth user this morning. He is the very chic Wijono S. of Jakarta, Indonesia. He has yet to check in at a single Indonesian hot spot. [BI]