Green Car Congress points us to a potentially exciting new fuel cell system which uses sodium tetrahydridoborate: NaBH₄ with a catalyst as the source of hydrogen fuel. The reaction is entirely inorganic (i.e., no carbon output), requires no energy, operates at ambient temperature, and the NaBH₄ is non-flammable and non-explosive. The main difficulty may be cost and availability -- any chemists in the audience care to say what it takes to create sodium tetrahydridoborate?