2 links below. I like the first once best because it has a cool list of folks:
http://www.altenergyaction.org/mambo/index.php?option=com_weblinks&catid=15&Itemid=4
http://www.altenergyaction.org/mambo/index.php?option=com_frontpage&Itemid=1
International Association for Energy Economics
Journal and newsletter devoted to economic issues of energy supply and demand; organization seeks to gather both professionals and those interested in these issues form an economic standpoint
EarthTrack
Collection of studies and reports from Doug Koplow, on energy subsidies and ongoing legislation: good analysis of the recent energy bill.
Energy Future Coalition
Nonpartisan alliance that seeks to identify energy policy options with broad political support.
Union of Concerned Scientists – Energy
We have much in common – among the five steps to take on global warming, UCS states “Yet, we invest far more in subsidies for the fossil fuel and nuclear industries today than on R&D for renewable energy or advanced vehicle technologies. For instance
Renewable Energy Policy Project
Advocacy and discussion groups on renewable energy options. Not terribly active, but occasionally updated