If I am reading this correctly, I am not eligible for the incentive since I used the max of $1500 in 2010. I want to possibly install new windows this year, but it looks like I can not qualify for the tax credit according to this info. Crap!
(broken link removed to http://www.dsireusa.org/incentives/incentive.cfm?Incentive_Code=US43F)
(broken link removed to http://www.dsireusa.org/incentives/incentive.cfm?Incentive_Code=US43F)