Re: water as fuel
We just talked about it the other day in my chemistry class. Lol, we proposed some far fetched ideas about it though. I'm thinking use solar panels to harness the power of the sun, use that that to make steam, and propel the car. Also, the car would would use the sun-power to charge the battery during the day so you could still drive at night.
Rig -- Emachines T5026, 3.06ghz P4, 300W Bestec PSU, 160 sata hd, 512mb dual channel 3200 ram @ 3-3-5-8, ATI Radeon 9250 pci, dual layer 16x dvd+/-rw.