While you're taking in that shakycam above, this Twitter feed says Trackmania 2 will be a PC release at launch ("No XBLA, PSN or Mac ports. Nadeo only want to focus on PC.") and will feature four splitscreen modes: Cup, regular championship, team, and cooperative. Nadeo is said to have spent three years working on it.
TrackMania 2 Revealed [Blue's News]