Nintendo’s going to be demoing this tomorrow, but it’s worth mentioning today. The MotionPlus accessory attaches to the port on your WiiMote and “allows for more comprehensive tracking of a player’s arm position and orientation.” Sounds good to me; I’m guessing it’s basically another set of accelerometers and such that work in concert with the ones you’ve got and make for more precision in detecting your movements. Considering the Wiimote is already ahead of the competition in this regard, the MotionPlus should widen the gap considerably. I’ll have more for you after their press conference tomorrow morning.