I don't think he sell out (yet).
He has patented his engine converted thingy and created a company already.
According to Fox News, the US military already asked him to get prototype going to make Hummer able to be run with water and/or gasoline (won't help if the hummer is running in hot desert area, wink wink, nudge nudge).
Yeah, Ballard power
it should work, it must! (I am in deep desperate feeling after seeing smog and polution during summer vacation).
I also hope that the guy that convert his car to take his restaurant used-frying-vege-oil get more coverage on the news. That one actually quietly gaining popularity amongst the people of his town. I hope Willy Nelson and his bio-diesel bus heard about it too.
Personally, I rather smell french fries than gasoline or diesel smell, but... let's just hope that, that won't happen or we will have more health problem when people subliminally driven to buy more McD fries.