Get ready to ante up some day soon Ian, Perth has been running (EDIT) hydrogen fuel cell powered buses since 2004. This is using stored hydrogen as a fuel currently, not an on board conversion from water. (END EDIT)
http://www.abc.net.au/catalyst/stories/s1215269.htm
While the system isn't perfect yet it's getting closer each day as they explore new methods of obtaining clean H2 from non-greenhouse producing sources, solar looks like being the biggest likelihood here in Australia.
(ADDITION) You can buy a small scale fuel cell car with "solar powered refuelling station" that makes hydrogen from water from Jaycar right now for under $200.
" * TIME Magazine product of the year *
Hydrogen fuel cells promise a viable alternative to fossil fuel-guzzling cars. No combustion occurs inside a fuel cell - all you need for the H-Racer is water and sunshine. The fuel cell converts hydrogen and oxygen into electricity. The palm-size car has an on-board hydrogen storage tank, a fuel cell system connected to the car’s electric motor, and a hydrogen refuelling system linking the car’s storage tank to the solar-powered refuelling station. The H-Racer is also very safe as only tiny quantities of hydrogen are needed to power the car. Today, many of the world’s car manufacturers including Toyota, Ford and Honda are developing hydrogen fuel cell vehicles with the hope of introducing this technology in the near future. "
(from
http://www.jaycar.com.au/productView.asp?ID=KT2529 )
manufacturers website :
http://www.thamesandkosmos.com/products/fc/fc2.html
(END ADDITION)
I reckon if they can power a bus (EDIT) and have it convert hydrogen from water on board(END EDIT) your Pajero isn't a hard target at all.