Crimson Halls, another wing within Icecrown Citadel has been unlocked this week. The Icecrown Citadel raid overview here on WoW.com has been updated accordingly. Summaries of the Blood Princes Council and Queen Lana'thel are available along with links and resources. Just starting out in Icecrown CItadel? Don't worry as information about the bosses in both the Lower Spire and the Plagueworks are still available
Good luck! Guess you'll be playing for Team Edward for one fight.
Patch 3.3 is the last major patch of Wrath of the Lich King. With the new Icecrown Citadel 5-man dungeons and 10/25-man raid arriving soon, patch 3.3 will deal the final blow to Arthas. WoW.com's Guide to Patch 3.3 will keep you updated with all the latest patch news.