This article coughed my attention today:
It all happens in a game called Project Entropia, an online RPG-like in which you can transform “real-world cash” into “virtual world cash” (PED Project Entropia Dollars) AND BACK! This can have some very interesting consequences in the economy. They say that the GDP of this virtual world is almost equivalent to the GDP of Namibia (that isn’t that much, but imagine that it’s just the beginning). That’s what investing money on entertainment is!