This was in the Bill last week. I saw this at Freds TDI.
The House Bill would provide an elective tax credit for "qualified advanced lean burn technology motor vehicles," which are vehicles powered by an internal combustion engine designed to operate primarily using more air than is necessary for complete combustion of the fuel and incorporating direct injection, that use only diesel fuel, the city fuel economy of which is at least 125% of the 2000 model year city fuel economy for a vehicle in the same inertia weight class, and that are certified as meeting or exceeding the Bin 8 Tier II emission level established in regulations under §202(i) of the Clean Air Act. The credit amount would vary from $500 to $3,500 depending upon the vehicle's city fuel economy and lifetime fuel savings. The credit would be allowed to offset both the regular and alternative minimum taxes.
Effective for property placed in service after the date of enactment in taxable years ending after such date, but before 2008.
Also found this:
Consumers of clean-burning diesel cars, trucks and SUVs will be eligible for the same kind of tax credits as hybrid consumers under the new legislation. Beginning January 1, 2006 and extending through December 31, 2010, consumers who purchase diesel-powered vehicles will be eligible for up to $3,400 in tax credits based on the weight, fuel efficiency rating and emissions level of the vehicle, as determined by the U. S. Environmental Protection Agency. "These incentives are an important step in expanding the market for energy efficient vehicles," said Allen Schaeffer, executive director of the Diesel Technology Forum.
Attention: TDR Forum Junkies 
