That's right! The World of Warcraft: Wrath of the Lich King closed beta is about to start. Blizzard Entertainment will start sending out emails to selected participants who signed up to the closed beta Opt-in. These emails will contain a special CD-key that must be used to upgrade a current Burning Crusade account into a Wrath of the Lich King Account, allowing to copy a character or more into the closed beta servers. Once these steps are done players will have access to download the closed beta client. Patch Notes are also available.