Mid-size and large cars were led by the Toyota Camry, the Nissan Altima hybrid, and the Mercedes Benz e320 Bluetec Diesel.
SUVs included the Toyota Highlander, Lexus RH400, and Toyota Rav-4.
Additional information can be found here. It's interesting to note that the only non-japanese car on the list is German, and that none of the much vaunted American offerings even made it on the list of top contenders. The Chevy Tahoe Hybrid, 2008 Green Car of the Year at the LA Auto show, doesn't even appear on this list. Go figure.