Patch 4.2 went live last night on WoW servers, bringing with it a new tier of raid content for pve (the Firelands), a new pvp season and tier of pvp gear, a new legendary caster staff with an appropriately epic quest line attached to it. a huge new daily quest hub similar to the argent tournament in Wrath of the Lich King and a bunch of other changes, tweaks, fixes and additions.
Full official patch notes can be found here
and MMO Champion has a recap up showing all the items, bosses and other bits and pieces that are arriving in the patch, click here
for all the info on that.
You can install the 4.2 patch using Blizzard's downloader, or if you're daring, you can download the manual patch files here from AusGamers
(sorry, no nice and easy patch installer has been made available yet).
World of Warcraft: Cataclysm "Rage of the Firelands - Patch 4.2" Trailer
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