Blizzard has rolled out the latest update to their real money auction house in Diablo 3, this evening commodities are now live.
Players can now sell items such gems, dyes crafting material and plans for real cash which is really going to expand the auction house system. Right now we have no idea how the market for such items will pan out but it will be interesting to see how the prices settle in a week or so.
Since the launch this evening, the auction house system in North America has been struggling on the server but it should settle once the novelty wears off.
Blizzard has yet to launch the gold for real money part of the RMAH, that will be going live at a later date.