Here are PTA-PTF cars approved since the most recent Rules release 2010 (v 5.1) on 11-20-09:
Alfa Romeo 164 ('91-'93)(FWD)(183 hp)---PTF* 3325 lbs
BMW M3 (E90, E92, E93)('08-'10)---PTB** 3625 lbs
BMW MINI Clubman S ('08-'10)---PTE* 2800 lbs
Chevrolet Camaro SS ('10)---PTB 3860 lbs
Chevrolet Corvette GS ('96)---PTC** 3350 lbs
Chevrolet Corvette GS ('10+)---STSU
Ford Mustang GT ('10)---PTC 3530 lbs
Ford Mustang GT ('11)---PTB 3770 lbs
Ford Probe GT ('89-'97)---PTF* 2875 lbs
Ford Shelby GT500 ('07-'09)---PTA* 3920 lbs
Ford Shelby GT500 ('10-'11)---STSU
Honda CR-Z (1.5L Hybrid)('11)---PTG** 2650 lbs
Hyundai Genesis Coupe 2.0L Turbo ('10)---PTD* 3300 lbs
Jaguar XJS ('88-'91)---PTF** 3915 lbs
Lexus IS F ('08-'09)---PTB 3780 lbs
Mazda Mazda3 (2.0L)('07-'10)---PTF 2780 lbs
Mazda Mazda3 (2.3L)('07-'09)---PTF 2930 lbs
Mazda Mazda3 (2.3L)('10)---PTF* 2930 lbs
Mazda Mazdaspeed3 (turbo)('10)---PTD* 3215 lbs
Mazda Miata MX-5 turbo ('04-'05)---PTE* 2529 lbs
Mercedes C43 AMG ('98-'00)---PTC 3450 lbs
Nissan NX2000---PTF 2520 lbs
Nissan Sentra SE-R 2.5L ('02-'06)---PTF* 2800 lbs
Suzuki SX-4 Sport ('08-'09)---PTF 2665 lbs
Suzuki SX-4 Sport ('10)---PTF 2750 lbs
Toyota Tacoma X-Runner ('05-'10)---PTF 3805 lbs
Volvo 850 T-5R ('95), R ('96-'97)---PTE* 3240 lbs
VW Golf 2.0L TDI ('10)---PTG** 3000 lbs