http://www.altenergystocks.com/ (alternative energy (AE) capitalism)
is a North American focussed site dedicated to proposing viable, comprehensive solutions using off-the-shelf technologies.
Other sites include:
http://ergobalance.blogspot.com/ (European perspective by a consultant based in the U.K.)
http://saltwatermatt.stumbleupon.com/ (Australia-based omnibus site, a bit left wing)
http://tresenglish.stumbleupon.com/ (both national and local (Teaching & Helping project) based in Arizona, USA)
http://bs1999bs.stumbleupon.com/ (excellent AE links, also has environmental focus: warning - disturbing images!)
http://peaknik.blogspot.com (omnibus site with innumerable links, USA)
http://www.cleantechblog.com ("the premier cleantech site for commentary on technologies, news, and issues relating to next generation energy and the environment.")
http://www.energybulletin.net (much more than "a clearinghouse for information regarding the peak in global energy supply")
Please add your favourite sites.