You've heard about the XBox 360 disc-scratching thing, right?
Someone brought back a disc to our store the other day that was scratched from their 360 - perfect circles along the outer edges of the disc - and *DEEP* scratches too. I'd be PO'ed.
So Microsoft can't get enough machines out in time and, apparently, there's a small, but noticable amount defective (scratching discs, over heating, etc). GO MS!