Regarding 3): The interesting thing here is that with the PS3, it's very easy to add a mouse and keyboard, as the console supports pretty much any class-compli

Regarding 3): The interesting thing here is that with the PS3, it's very easy to add a mouse and keyboard, as the console supports pretty much any class-compliant USB model. Epic Games actually tried this a few years ago with Unreal Tournament III, though I don't think it supported cross-platform multiplayer.