The Virginia Department of Mines, Minerals and Energy has released details on how to give your feedback on Gov. Tim Kaine's Virginia Energy Plan. You can submit short comments online or submit long comments via e-mail (not sure how/why they're separating the two).
For more details, you can visit energy plan website or download the complete PDF document (5.5MB). You can also read The Green Miles' review of the the Virginia Energy Plan or the Sierra Club's alternative Citizens Energy Plan (777K PDF).