It may not be strictly classified as a car, but this wind-powered skateboard took a German kiteboarder across Australia in a very car-like 17 days. We think that qualifies as a road warrior. And as aspiring kiteboarders ourselves, we think that whole roadworthy setup, air-filled tires, brakes and all, is cooler than hell.
Earthflyer Wind-powered skateboard [Treehugger]