The South Korean Government has stated they are going to begin taxing the real money made via virtual transactions: In American terms, that means such things as selling gold on World of Warcraft, or buying property at Secondlife. Taxes will be collected at the service provider level - an automatic VAT (Value Added Tax) will be deducted from seller's monthly revenues.
Governments have been taxing the licensing and sale of intellectual property for a very long time; the real surprise here is they didn't start taxing real money game transactions sooner!
[discovered at Slashdot]