Well, as the owner of 4 PS3s (all for sale, by the way), I can tell you that after playing the downloadable demo of this game...sorry, but the gameplay sucks IMHO. WAAAAY too "arcade-ish" for me. Not even close to a sim racer. It looks very pretty and extremely real, but as I've been observing about all of the games released so far for the PS3, it seems the game developers are concentrating too much on how the games look and not anywhere near enough on how they play. This is why all 4 of the PS3s I managed to acquire are for sale. I won't be interested in having a PS3 at least until Metal Gear Solid 4 is released...or the next Gran Turismo (be it GT: HD or GT5), whichever comes first.
Granted, what I played was just the demo of the game. Hopefully there's much playability to come in the actual release version...hopefully.
Pyro