Not that i'd wish to side with the Bush administration, but http://www.dpi.wa.gov.au/fuelcells/hydrotech.html

"Steam reforming of natural gas is currently the most widely used and economical method of producing hydrogen. Close to 98% of hydrogen is presently generated from fossil fuels such as natural gas."

"For the purposes of the Perth Fuel Cell Bus Trial, the hydrogen used will be produced as a by-product from BP's Kwinana oil refinery."