It may not look much different than your average black cab on the outside (decals aside), but it's quite a different story under the hood of this taxi, which has just been deemed road legal in the UK. Developed by Intelligent Energy, the cab actually includes both a fuel cell with a 30 kW net output and a 14 kWh lithium polymer battery pack, which combined promise to provide enough juice for a full day of operation -- along with a top speed of 81 MPH and acceleration from zero to sixty in fourteen seconds. Londoners won't be seeing them everywhere just yet, however, as the company only expects the first fleet to be ready sometime next year in time for the 2012 Olympics.

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