I read a Yahoo blurb that was quite interesting. Around a week ago or so some college brains have taken aluminum "pellets" and gallium (i think) combinded them with water to make hydrogen. The reaction between the two compounds and the water apparently work and can power small engines (lawn mowers, chainsaws and stuff).
That said: as technology advances it's possible to buy these two items "off a self" add them to water and produce hydrogen to power varoius things. All we need now are recyclers that instantly wash, crush and compress aluminum into pellets outside of every gas station in North America. I expect it around 2015 or so. Happy riding.