Okay what many of you dimwits are apparently not able to fully understand, is that all games have different amounts of textures to load in the game. So for instance, games like Halo 3 whose multiplayer has much simpler textures and details take up less memory, make it possible to have four players online on one console. A game like Modern Warfare 2 on the other hand, has much more detailed graphics and textures, which would make split screen online impossible. You can't have your cake and eat it too. That's just the way it is. Perhaps the next generation of consoles will be able to fully render levels for 4 players.