And just like that, along comes a listing on the GAME website!
No price as yet though, and the listing is not live for re-orders yet either 
EDIT: Listing is now active, price is £349.99
http://www.game.co.uk/Limited-Edition-Star-Wars-Xbox-360-320GB-with-Kinect-and-Kinect-Star-Wars-Game-/~r356106/
PLAY.com have it up too,
but no price and no active listing as yet:
EDIT: Listing is now active, price is £349.99
http://www.play.com/Games/Xbox360/4-...rlrefer=search
And Amazon.co.uk also have it listed, with a price tag of £349.99, so at least £15 more expensive that ShopTo's price:
http://www.amazon.co.uk/Xbox-Kinect-...1340244&sr=8-4