Well its official on the Blizzard.com website - Wrath of the Lich King will be released on November 13th.

"In the frozen wastes of the north, the Lich King Arthas Menethil rallies his undead army and schemes to bring an end to all life on Azeroth -- and in a couple of months, you'll begin your epic journey into Northrend to confront the Lich King and his minions yourself. Blizzard Entertainment's second expansion to World of Warcraft -- Wrath of the Lich King -- will be in stores on November 13 in North America, Europe, Mexico, Argentina, Chile, and Russia, and on November 14 in Australia, New Zealand, Thailand, Singapore, and Malaysia. The expansion will be available in Korea and the regions of Taiwan, Hong Kong, and Macau on November 18, and the launch timing for China will be announced at a later date. For more information, read the press release or visit the Wrath of the Lich King website.

Wrath of the Lich King will be available in both a standard edition and a special Collector's Edition (in select areas). The Collector's Edition will contain an art book, behind-the-scenes DVD, exclusive in-game pet, and more. For pictures and a complete list of contents, check out the Collector's Edition website."