As with previous major updates to Xbox Live, Microsoft is offering you a chance to try out new features like Zune integration, Facebook, and Twitter before everyone else gets their grubby paws on them.
It's the triumphant return of the Xbox Live Preview Program, and everybody is invited! Invited to apply that is, but Major Nelson says they are searching for multiple thousands of participants to test out the latest Xbox Live features, and you're just a brief application away from being considered. You can visit the Xbox Live Update Preview page right now to apply, but make sure you've got your Xbox 360 serial number handy, because they're gonna ask for it. I told you to keep it on a card in your wallet, but did you listen?
Xbox LIVE Preview Program: Zune, Facebook and Twitter [Major Nelson]