And now for your occassional dose of hydrogen power news:

ECD has developed a metal-hydride storage system that 'sponges' gaseous hydrogen so that it is contained within a solid material, which Schmidt says reduces the risk of serious accidents and allows more hydrogen to be stored in the vehicle.

Basically, it helps eliminate the possibility of driving the Hindenburg down Main Street.

This quote, however, is far more important:

ECD modified a Toyota Prius gas-electric hybrid sedan by replacing the gas tank with a 450-pound metal-hydride storage tank and adding a turbo charger to increase the performance of the internal combustion engine, which then ran on hydrogen. The modified Prius has a range of about 150 miles, according to Schmidt.

Sounds like the perfect city car to me.