Rob sent this information on power plants in Colorado:

Well here is some good news: “Colorado approves plan to shut down two coal plants”

http://phoenix.bizjournals.com/denver/stories/2008/08/18/daily23.html

Some nice quotes:

The closures are two to four years away, and Xcel has proposed using natural gas to make up for the lost power supplies.  “In reaching the decision the commission was trying to move Xcel Energy toward carbon reduction goals that Gov. [Bill] Ritter has outlined in his climate action plan,” PUC spokesman Terry Bote said Wednesday.

“Also, they were adding renewable-energy resources in a cost-effective, technically feasible manner, ensuring an adequate supply of electricity in the future and being respectful of the cost that consumers have to bear,” he said.

One of the reasons that renewable energy resources are now more likely to be cost-effective, is because they are selling their RECs (Green Tags) into the marketplace.