Rare has built and launched a Kinect Sports application for Facebook, which will keep track of players' league results, allow them to issue invitations and be invited to others, and collect video highlights in a single place.
The application will soon update with the ability to see complete personal stats and records (by event, or altogether). Videos and results won't be shared until players give the go ahead. Rare's touting this as a chance to brag and lay down challenges to Facebook friends playing the game.
Pick it up at the link.
Kinect Sports on Facebook [Application]