Due to the severe protracted drought of 2007 in the US Southeast, it is reasonable to assume that Alabama, Georgia, and the Carolinas were, in 2007, producing much less renewable electricity than would have been considered "normal" in 2006.
Texas and California are unique in their high wind power capacities.
New York is a standout hydro-power state. Regional precipitation changes that shape hydroelectric capacity in New York are geographically 'smoothed out,' as the watershed driving New York's hydroelectric turbines spans portions of 6 states and Canada.
States with low existing renewable energy capacities, respectively, with low potentials for adding more renewable energy capacity, and which have a high projected coal power dependency, are going to be in a world of economic hurt, come a carbon "Cap & Trade" law. If you thought the "Culture War" scenario of 2004 caused a political upheaval in the USA, hang on. For the future dimension, compare this table with which way the wind is blowing in Government Study Claims Twenty Percent Of US Power From Wind By 2030.