One of the few vehicles on display at the Hydrogen + Fuel Cells 2009 conference here in Vancouver is a modified GMC Sierra 1500 pickup truck. The modifications involved swapping out the gas tank for three 150-liter compressed gas hydrogen ones (they're huge and take up most of the bed, as you can see in these pictures: 1, 2) that allow the truck's internal combustion engine, a V8 with a supercharger, to burn H2 instead of petroleum.
The truck is used by the ecoTechnology for Vehicles department of Transport Canada to explain and demonstrate hydrogen vehicles to people. eTV uses waste hydrogen from the Integrated Waste Hydrogen Utilization Project (IWHUP) to fill the tanks and it was IWHUP that originally converted the truck. You can see the specs of the vehicle here. Even though eTV was showing off this H2-powered vehicle and a Nisssan X-Trail FCV, the group is not locked into promoting any one particular type of alternative fuel and regularly tests a variety of vehicles to help meet its goal of helping to "reduce vehicle greenhouse gas emissions, pollutants and fuel consumption in order to promote a sustainable transportation system for Canadians."