Call me crazy, but I am still collecting Azeroth keys and attunements. It's this thing I have with needing to complete things. I realize fully that I will hardly ever go to UBRS now that I am 70 (it's a Murphy's Law thing), but should any of the lower members of the guild need entrance for attunements or gear of their own (my guild is full of collectors just like me), then I will be able to help them out. I have two out of the three gems needed, and have in my spare time been running the instance with our guild leader trying for the third. So imagine my irritation when I read today on QJ.net that the quest line is bugged, severely.
Vaelen, the schmoe who gives you the quest in the first place, is now in the habit of deleting the quest and your quest items when you talk to him. Now, this isn't right by any stretch of the imagination. Vrakhris mentioned in the forum post that Blizz knows about the problem, and are working on fixing it in an upcoming patch. Meanwhile, there's a workaround to tide us over.