It's been a little over a month since we last saw the Social Bicycles (or SoBi) bike lock concept, a simple thing that could revolutionize bicycle loaning worldwide. Now, here's the first working prototype, a GPS-enabled device that affixes to the rear wheel of a bike set to be offered up to others. Those others can call up a mobile app to locate available rides and retrieve the password necessary to unlock them. Once done pedaling they can just lock the thing up again and it's immediately added to the queue of available human-powered chari
