For those looking forward to Gran Turismo 4 here is a partial car list. These were the cars featured in the demo at E3.

Alpine Renault 1600S
Nissan Fair Lady 240AG
Subaru Impreza Rally Car
Subaru Impreza WRX Sti
Mitsubishi Evo VII Rally
Mitsubishi Lancer Evo VIII
Chevrolet SSR
Lotus Europa Special
Chevrolet Corvette Stingray 350
Chevrolet Camaro Z28 302
Isuzu Giulla Spirit 117 Coupe GTA
Toyota Corolla Levin 1600 GT Apex
Plymouth 'Cuda 440-6
Pontiac GXP
Toyota Supra 2.5 Twin Turbo
Honda Prelude Type S
Suzuki Cappuccino
Chevrolet Chevelle SS 454
Pontiac GTO
Chrysler Prowler
Pontiac Vibe GT
Chevrolet SS12
Nissan Z Unlimited Edition
Honda RSX-R Unlimited

I have highlighted the cars that I am looking forward to. Finally we have Pontiacs!!! Lets just hope that they have room to squeeze in the 35th Anniversary Edition Pontiac Firebird.