Diablo III's real-money auction service, and it's getting a new wrinkle added: In order for players to use the service, they'll need to have an authenticator attached to their accounts. This is being done to help ensure that the auction house is as safe as possible for all players. It also means that players will need to accept a new set of agreements when the feature finally goes live.
Community manager Kaivax has also chimed in on the real-money auction house, noting that it's possible that the feature will launch with only item-trading functionality rather than allow players to buy and sell commodities. This is largely based on trying to ensure that the latter market remains active and fair for all players, and if the team decides to go this route, the commodity functionality will be added at a later date.