I remember a company in Florida called Consulier
http://www.consulier.com/ had done something with fuel cells and I still have a magazine article on it. They were even talking about racing with a fuel cell car after they won one of the endurance races at the time with the Mosler Raptor. They now make the Mosler
http://www.moslerauto.com/test/index.html which are just fantastic looking cars.