The following is an excerpt from a press release from the Department of Energy (DoE) that came out today:

"DOE’s Hydrogen Program and Fuel Cells 2000 have released a new searchable database of fuel cell and hydrogen activities in the United States. The database allows better access to information on stationary fuel cell installations, vehicle demonstrations and fueling stations – as well as state policies, initiatives and legislation aimed at advancing these technologies."

Try running some queries on the database of fuel cell and hydrogen activities. I didn't check out the website too extensively but from what I saw it looks pretty comprehensive.