Clean and abundant, hydrogen is the fuel of the future—and always will be. Or so the joke goes. In California, for example, Gov. Arnold Schwarzenegger envisioned 100 auto-ready hydrogen stations along the coast. After five years, however, only a few dozen are in place, and enthusiasm—not to mention funding—has waned. Without a larger network, automakers won’t commercialize hydrogen-ready cars. But without cars, few companies have been keen to invest in fueling stations—until now.