Blizzard Entertainment today announced that World of Warcraft: The Burning Crusade sold through 3.5 million copies within one month, while its worldwide subscriber base now numbers more than 8.5 million and is continuing to grow. The company is currently working with its partners to localize the content into Simplified and Traditional Chinese for mainland China and the regions of Taiwan, Hong Kong, and Macau and release the expansions in those regions as soon as possible.