Energystar just updated the 09 energy tax credit information on June 11th. Here's a breakdown of what qualifies and what doesn't. http://preview.tinyurl.com/entaxcreds
I perform infrared home energy audits and infrared surveys of buildings. I'm co-authoring a college textbook and I also have written a residential energy audit book on CD. It is available on ebay or www.cirtc.com