They are using the methane from landfill here in Australia as a power source
There is also a interesting project going on at a coal power station that has some potential
http://www.macgen.com.au/News/2006Ne...ectUpdate.aspx
There is some good work on solar power happening here in Australia that would help overcome some of the biggest problems with solar power (what happens at night!)
http://www.abc.net.au/catalyst/stories/s1698520.htm