Dragonwrath, Taregosa's Rest
Sounds like it's going to be really awesome. I haven't been in a position to obtain any other legendaries before, so I'm pretty excited about this considering it's one I could use. The story line of the blue dragon flight choosing a new leader sounds really interesting, and I love the fact that you can turn yourself into a blue dragon with the legendary. Rewarding your whole guild once you get the staff is pretty awesome too, even if it's just a mini-pet.