Blizzard simply can't make up their minds about this, can they? The Rusted and Ironbound Proto-Drakes, which are rewarded for completing Glory of the Ulduar Raider on Normal and Heroic, were slated for removal at an unspecified time in the future after patch 3.2's launch. The reasoning was that it would be easier to acquire them with Coliseum gear, and they were meant for cutting-edge players only.
However, Eyonix has just announced that they are not planning on removing these proto-drake rewards from the achievement in patch 3.2, and furthermore, they don't plan to do it "in the foreseeable future." In the event that they do change their minds again, you are promised a one-month warning. So get back to those hard-modes!
Patch 3.2 will bring about a new 5, 10, and 25 man instance to WoW, and usher in a new 40-man battleground called the Isle of Conquest. WoW.com will have you covered every step of the way, from extensive PTR coverage through the official live release. Check out WoW.com's Guide to Patch 3.2 for all the latest!