This is one of the coolest and most innovative uses I’ve seen lately of using Foursquare. It appears that they’ve tied the Foursquare API into a device that unlocks the door upon checkin. There’s not much information on their website – http://apartm.net/newyears/2011/ – but one thing is for certain, they’ll probably end up with a whole lot more attendees than they anticipated. Very cool use of Foursquare!
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