Some of the biggest cheers at the Nintendo event were for the new Mario game for Wii, now known as Super Mario Galaxy.
Nintendo says that in Super Mario Galaxy, Mario will take "the ultimate step... out into space" where he will "defy gravity across all the planets in the galaxy". Apparently the story is about a strange creature that kidnaps Princess Peach and runs off into outer space, and Mario gives chase, exploring bizarre planets all across the galaxy (Not sure how Bowser will fit in to all that!). As expected for a new generation Mario game, Super Mario Galaxy will use the Wii controller and the Nunchuck to it's fullest extent, allowing for dozens of new moves, such as a melee attack achieved by shaking the controller, and a 3D grabbing ability using the controller as a pointer. The space and sci-fi setting will allow for low gravity jumps and physics defying platforming, and apparently aliens will make an appearance.
Super Mario Galaxy is expected to be a Wii launch title, so we'll hopefully be playing with Mario again before 2007!