There is an important bill in the House, H.R. 2304: Advanced Geothermal Energy and Research Development Act
In addition, the Senate is working through S.1543: National Geothermal Initiative Act of 2007.
The Massachusetts Institute of Technology estimates that 50 gigawatts or more of coal-fired electrical capacity will need to be retired in the next 15 to 25 years due to environmental concerns, mainly atmospheric carbon dioxide emissions.  Additionally, as much as 40 gigawatts of other existing power sources may have to be decommissioned in that time frame.  As a result, there is an even greater need for reliable, low-cost electric power and heat supply for the nation. 
Make sure your elected officials are aware of your interest in pursuing this and other renewable energy sources.
You can learn more about the legislation via the following links:
http://www.govtrack.us/congress/bill.xpd?tab=main&bill=h110-2304
http://www.govtrack.us/congress/bill.xpd?bill=s110-1543