Seems as though some people are having trouble obtaining a copy and many places are either already sold out or will do shortly. I thought some people might find a thread on remaining availability useful. Add your location requirements or remaining copies spotted here.
Games Workshop Milton Keynes had one remaining copy this morning. I was sooo tempted to snap it up. The guy in the shop also told me there were about a dozen left in the Bedford store.
Grab it while you can! It is a really good and atmospheric game...