Art Bell had Bob Lazar ( yes that Bob Lazar) who is working on a cold fusion car right now:
http://www.unitednuclear.com/
Imagine if people had discounted A.G.Bell as a crackpot, we woud still be in the "dark ages"
I know an engineer, not associated with Lazar, who is also working on the hydrogen injection for internal combustion diesel and gasoline engines mentioned on the site you link to. They are apparently having some fairly remarkable sucess with it. From my understanding they inject a small amount of hydrogen into the combustion chamber to get more bang. The result is a huge increase in efficiency.