От website-а на Blizzard:

http://eu.battle.net/d3/en/blog/4347081/Diablo_III_Auction_House_Update_-03_05_2012#blog

Want to know more about Diablo III’s new auction house feature? We’ve just updated the Diablo III web site with a comprehensive Auction House guide that walks you through the ins and outs of Diablo III’s in-game item marketplace, including details on buying and selling, a breakdown of how the real-money auction house works (in regions where available), and more. You’ll also find some important information on Battle.net account-security requirements that players interested in using the real-money auction house will need to know about.
The gold-based auction house opens its doors worldwide on May 15 with the launch of Diablo III, and we plan to bring the real-money auction house online approximately one week after that. This is a new service that includes lots of complex elements, so we are going to take a little extra time to ensure the game gets off to a good start before we flip the switch and open the real-money auction house for business.
For more information, head to the freshly minted Diablo III Auction House website, or check out the updated Auction House FAQ.