Microsoft has the newly released Kinect PlayFit for Xbox 360 in the Xbox LIVE Marketplace as a downloads for FREE for limited time.

Get the PlayFit app by visiting Kinect Central from the home page of your Xbox 360 dashboard. Check out the Fitness & Dance section, and download the app. Get credit for the calories you burn while playing Kinect for Xbox 360. Track your progress over time, and see how you stack up against your friends and across the globe. Show off to your friends online, complete Xbox achievements, and earn free avatar awards.