Game of Thrones - Steam Preorders Open

Steam has opened preorders for Game of Thrones, though the price of $49.99 might be pushing the boundary for the game's limited profile. You do get a free Prima game guide with your preorder, though. I remain confused about the release date, which shows as June 2nd for me, though we had been told that was only for England and Ireland and other territories remained May 15th - we'll find out soon, obviously.