At Microsoft's E3 press conference today, Nike announced Nike+ Kinect Training for Xbox, a comprehensive fitness system that ties into your FuelBand and has a social component that allows you to work out with and compete against friends. It's got an in-game trainer to make sure that you're appropriately motivated, and any Fuel points that you earn on the system tie in with your existing account. Considering Kinect's motion-sensing chops and the uptake that Nike's gotten with the FuelBand, this could be a big seller — look for it to launch in holiday 2012.