Confirming our earlier post, Blizzard poster Zarhym has just announced the release of Patch 3.3: Fall of the Lich King today on the official WoW forums. The complete patch notes are available here on WoW.com or on Blizzard's patch notes page.
There are still several hours to go until the patch goes live, so until then, check out our Patch 3.3 resources:
Update: We will be seeing the trailer tomorrow (not tonight).
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.