In spite of the site Flemming linked to I would NOT count on this being region free. Almost all of FOX's Blu-Ray releases are region locked and I can't imagine them making an exception for this, of all releases. So I recommend waiting until you get a more official answer - Either from LiesInc or BluRay.com
David F - the image you link proves zip! It only shows UK-branded Blu-Ray releases of the Star Wars set, with BBFC ratings for the United Kingdom, and Irish Film Censor ratings for Northern Ireland. It bears no relation to the set being suitable to be played in any other nation, other than Region B Blu-Ray machines.