"You're just buying Diablo III. You can play it anywhere in the world. So you guys get to choose. Now what we will do is we will lock you down to a specific auction house. So for instance if you're a European national you'll have access to the European auction house, but you'll still be able to play in North America. You can participate in the gold auction house anywhere in the world, right, but you can only participate in the real money auction house in your native country."
Robert Bridenbecker, Vice President of Online Technologies at Blizzard