An Xbox Live-like Service For Open/Indie Gaming?

Byrne Reese writes "Amidst all the crazy ideas in online video entertainment in the past year, there is a small company called Arena Unlimited that is taking an interesting approach to gaming economies. As near as I can tell, they're trying to open up a multitude of online gameplay services (e.g., opponent matching, free market item trading) to the masses (i.e., open source and independent PC game developers). (I shudder to think what would happen if one could actually introduce a legitimate and real free market economy into The Sims.) It's no Xbox Live, and their list of supported games is pretty small, but if they can do all that they say they may one day support, then sign me up."