The Energy Star Credit, part of the Federal Tax Credits for Consumer Energy Efficiency, is available in 2011 and provides a tax credit for remodeling projects including heating and cooling, roofs, and windows and doors. See more at http://www.energystar.gov/index.cfm?c=tax_credits.tx_index
DSIRE is the Database of State Incentives for Renewables & Efficiency. Check the list of monetary incentives that promote renewable energy and energy efficiency at www.dsireusa.org