Gamasutra reports that the Burning Crusade expansion has surpassed the 3.5 million sales mark -- 2.4 million of which were sold within 24 hours of release. Regions that play on North American realms (which includes Australia, New Zealand, Singapore, Thailand, and Malaysia) accounted for 1.9 million copies, while the remainder were sold in Europe. BC was recently released in South Korea, and work is underway for Simplified and Traditional Chinese localizations for mainland China, Taiwan, Hong Kong and Macau, with an official release date "as soon as possible." The worldwide subscriber base has now reached the 8.5 million mark, with an increase of 500,000 new players in less than two months. For the mathematically-minded among you, that's a 6.25% noob increase since BC's release.