It's a concept. Designed by a free lance car designer. He's got a lot of other good stuff as well. He's known as "sabaman" in the car design world.
Here, check out some of his stuff:
http://sabaman.alfacom.org/misc.html
Mind you, I could be wrong about who rendered it (it might be some other 3D designer as well), but I'm definitely sure it is only a 3D concept, and nothing else.