Really, just expect any game that's going to all systems to have the PlayStation 3 version coming out at a later date. Valve's Doug Lombardi has confirmed
that The Orange Box
for the PlayStation 3 will be delayed a few weeks after the Xbox 360 and PC release. It's natural for the PC and 360 versions to come out at the same time as they can be close to the same code base. Delays for PlayStation 3 versions have been floating in at a constant pace so if you're a PlayStation 3 owner like myself, just expect a game that you want on that console that's also being released for the 360 will most likely miss the target release date and that your 360 friends will play the game a few weeks earlier than you.