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Re:Earth's core far hotter than thought by dkhenry on Friday April 26, 2013 @10:38AM (#5613142)
If I am not mistaken Iceland uses geothermal to a large extent and is very successful in doing so.
Re:Earth's core far hotter than thought by mtviewdave on Friday April 26, 2013 @10:58AM (#5613253)
Northern California, as well:

http://en.wikipedia.org/wiki/The_Geysers