Which I consider myself as one, as well as a oil, gas and nuke enthusiast. However, one must have certain conditions for the development of geothermal resources such as a relatively shallow heat source and controllable water chemistry. It is not the cure all.
OK, this technology (see link below) is 30 years old and for me in Ohio costs about $300 per year - total heating and cooling. Oh, but Democrats and/or Al Gore don’t get rich from selling this kind of geothermal. I understand.
http://www.waterfurnace.com/residential.aspx