Yup, after numerous, NUMEROUS runs through Heroic Sethekk Halls, I finally get my pretty blue birdie. All the other times I ran it, I did it by myself, and last night I just happened to be with my TK farming buddy, running any and all instances that dropped mounts (Ony and Maly are pains in the butts, so we're not going to even attempt), and we decided to run H Seth. He already had the mount, so it was guaranteed to be mine. I was so happy to see that it finally dropped and I no longer have to weave my way through that place to get it.
The day before that, I managed to get my Dark Phoenix. Getting exalted with your guild takes FOREVER.
Now, I'm sitting here in Deepholm, waiting on Aeonaxx to spawn for me. D: I might go get my TB drake sooner or later, since I'm so close to getting 200 commendations.