The 2012 tax credit information can be found here.

Insulation

Tax Credit Amount: 10% of the cost, up to $500

Requirements:
Typical bulk insulation products can qualify, such as batts, rolls, blow-in fibers, rigid boards, expanding spray, and pour-in-place injection foam.
Products that air seal (reduce air leaks) can also qualify, as long as they come with a Manufacturers Certification Statement, including:
· Weather stripping
· Spray foam in a can, designed to air seal
· Caulk designed to air seal
· House wrap

Roofs (Metal & Asphalt)

Qualified roof products reflect more of the sun's rays, which can lower roof surface temperature by up to 100F, decreasing the amount of heat transferred into your home.
Tax Credit Amount: 10% of the cost, up to $500

Requirements:
"Metal roofs with appropriate pigmented coatings" and "asphalt roofs with appropriate cooling granules" that also meet ENERGY STAR requirements.

 
-