WOW - New Milestones for WoW & The Burning Crusade : World of Warcraft General Discussions

World of Warcraft: The Burning Crusade has established a new sales record for PC games, with approximately 3.5 million copies sold within its first month. Keeping pace with the expansion's sales, World of Warcraft's worldwide subscriber base now exceeds 8.5 million. You can read more about these achievements in our latest press release. We send our sincere thanks out to the players across the globe who have continued to help us bring Azeroth, and now Outland, to life, and we look forward to adding more great content to explore -- and seeing how the arena tournament plays out -- in the months ahead.

http://www.blizzard.com/press/070307.shtml