Q. Where can I find information on the geothermal industry?

IBISWorld (including China & Global) for industry report entitled
Geothermal Electricity Plant Operation in the U.S. (December, 2012)

Energy Information Administration (U.S. government) for geothermal statistics Today in Energy  

Government documents:

Geothermal Brief Market and Policy Impacts Update (2012)

Geothermal Exploration and Technology Act: report to accompany S. 1142 (2012)  

Science Direct for journal articles on geothermal energy.

Any of the above resources would also be suitable for renewable or alternative energy.  If you follow this broader path, you might want to add Plunkett Research Online .