Here in the UK the most resent official XBox magazine has a variation the Cover on the DVD Case has a 'Exclusive to Tesco' print variation.
What this is, is that Tesco's is doing an offer for a free copy of 'Jade Empire' that might be included in with the demo disk. Nothing major but though the collectors might like the heads up on the offer.
I didn't win one myself. ^-^ nevermind. XD