I saw the UK edition in the supermarket yesterday. Loaded up on two pallets either side of the entrance… I think they are intending to sell a few copies!
Very glad I imported the US Blu-Ray, it only cost a few pounds more and is much nicer. The UK BR is very standard with the normal blue case. The US one is in a nifty black case which really shows off the poster art, plus a slip case with sparkly gold embossed bits and twinkling star field. It also comes with a DVD copy and itunes digital HD copy (Not that I really care about those) which the UK one does not.