Blizzard has released patch 1.9 of World of WarCraft today. Be sure to log on and download it. This patch unleashes the epic world event opening Ahn'Qiraj among other things. You can read the full patch notes right here, but here are a couple of the main highlights:

The Gates of Ahn'Qiraj
The Gates of Ahn'Qiraj will house two massive, unique dungeons -- the Ruins of Ahn'Qiraj, a 20-man raid dungeon, and the Temple of Ahn'Qiraj, a 40-man raid dungeon. As players delve deeper into the mysteries of Ahn'Qiraj, they will discover revelations of the Silithid infestation and their shadowy masters, the Qiraji. Players will have to complete a world event of massive proportions before they can open the Gates of Ahn'Qiraj on their realm.

Linked Auction Houses
Players will now be able to buy and sell goods with greater effectiveness using the Linked Auction House system. Auction Houses in Orgrimmar, Undercity, and Thunder Bluff will now share the same pool of Horde player-created auctions, and Alliance players will find the same to be true when visiting Ironforge, Stormwind City, and Darnassus Auction Houses. This system has been expanded to support the neutral Auction Houses as well. Tanaris, Everlook, and Booty Bay will all be linked for players of both factions to access. In addition, the "Looking for Group" and "Trade" channels have been unified among the corresponding cities, meaning, for example, that you can trade your goods or look for groups in Ironforge while in Stormwind.

Soul Shard Bags
Tailors now can make soul bags to hold soul shards. The smallest is a 20-slot bag, the recipe for which can be purchased in Gadgetzan. The recipe for a larger bag can be found in Scholomance, and one for an even larger bag can be found in Molten Core. In the main UI, these soul bags will display how many shards they contain. So long as the soul bags have room, any soul shards a warlock creates will automatically go into the bag.

There are obviously quite a few more so be sure to read the patch notes for all the changes and bugfixes.

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War Effort makes getting Darnassus rep so much Easier now.

Though 20 or so bugs have popped up,

ZG
Venoxis casts his insta murder bea a lot more and it can hit at any range
Venoxis' poison clouds never dissapate
Bezerkers fear now crashes your game
Hakkar now has some wierd new move

BWL
The Drakes now reflect all magic back

MC
The Elemental listed units can no longer be properly banished

General
SoC bug is still around
if a Warlock has full reg bags and only an empty SS bag his game will crash
Only One person per server may get the new Timbermaw Trinket