The Renewable Portfolio Standard! The House just voted on the RPS amendment and it passed 220-190 , not nearly as close as many had thought.
To reiterate, it requires electricity suppliers to have 15% renewable energy in their mix by 2020. See numerous references in the posts below to the RPS and to links for specifics. A great victory occurred today for renewable energy and the environment. Let's really hope that it stays in when the Senate and House conference on their respective energy bills in September.
P.S. An hour later the House passed the full package, H.R. 3221, by a vote of 241-172.
P.P.S. A few hours later now, and the House has just passed the tax portion, H.R. 2776, the Renewable Energy and Energy Conservation Tax Act of 2007, by a vote of 221-189.
Here's a summary of today's events from Bloomberg News.