LOL. Dan Houser, my friend, is head of R* Games. He's the mastermind of GTA. Honestly krisilcoque, if you haven't bought a console yet, I'd suggest buying a PS3, and this is not based on GTA IV alone. Sony is purportedly applying in-game XMB ( a system which makes it easier to connect with your friends online, know when they're on etc. ) in the coming months, and the PS3 is also getting it's own take on achievements, called trophies. If you're deciding which console to buy based on GTA IV, I'd say it'd be the PS3 if DLC isn't a big enough factor for you.
EDIT: The 360 doesn't support mods. The PS3 does. There are already quite a few good mods for Unreal Tournament 3 on PS3.