"When gamers find themselves short of gold pieces for the purchase of that shiny new battle hammer in the online PC massively multiplayer online role-playing game World of Warcraft, they often tediously roam the fictitious realms, felling creatures for coins. But recently, another option has sprung up. Players of MMORPGs can now surf to one of the many third-party Web sites trafficking cyber currency, pull out a credit card, and exchange real dollars for fantasy coinage.
...getting a fair price in the exchange of real dollars for fantasy coins can be a crapshoot. Turns out it's hard to find reliable data about the dollar/virtual currency exchange rates in a pretend world where there's no Alan Greenspan setting interest rates and scolding everyone about irrational exuberance."
Spot On: Virtual gaming's elusive exchange rates - PC News at GameSpot