Edward CastronovaYesterday the Diablo III Real-Money Auction House opened for business. I'll call it the RMAH and it's interesting that the game company also calls it that. "Real money auction house." The company, Blizzard Entertainment, wants the players to think that the gold coins of the game are not real money while the dollar is real money. We'll see how long that lasts.The terms of service for the game actually put "real money" in quotes at one point. After the fold, a little of my personal experience and some thoughts on what it means. I spent about $10 total on four...