Diablo 3 will have a real money AH.

http://www.mmo-champion.com/content/239 ... 4#comments

Diablo 3's Auction House will feature two currencies, the first one will be in-game gold and the 2nd one will be real life money. Yep, you read it right, Diablo 3 will let you buy items with either gold or real life money! It's also worth noting that you will also be able to sell loot for money, and transfer that money outside the game. I guess gold farming just got interesting.

I wonder if this will eventually make it over to wow...

I saw this earlier. Wonder if they're will be some kind of dollar cap on gold/items? And it's not just gold or items, you can sell your characters as well.