How about making the hydrogen at home?
This guy is going to marketing his hydrogen fuel supply kit possibly as early as the Spring.
http://www.switch2hydrogen.com/
He also sells some cool scientific equipment and supplies.
He did an interview on Coast To Coast AM about what he is doing with this kit he is going to market to the public.
http://www.youtube.com/watch?v=2jekvhj2ciI
That's pretty cool! I've been studying HHO as a possible experiment for one or more of our cars (all of which made it onto the "Cash For Clunkers" list...), but I think burning straight hydrogen is even better. I like the fact that his system keeps the gasoline option, so running out of hydrogen is not really an issue. Thanks for pointing out his site; I'll keep an eye on what else he comes up with!