Not a drop for me (but I'm really jelly) but for one of the tanks in my guild.
Yesterday, me and my guild went for the Sha of Anger guild achievement, and when Sha just died, we just heard a whisper in teamspeak, saying "I got the mount, and I can't fly with it cause I'm not exalted with Order of the Cloud Serpent.
At first, we did not believe in him, cause he said he used it right away, but when I'm now looking at his armory - he was not lying to us.
Damn you, Steelblood, I am very jelly on you!
Armory for proof:
http://eu.battle.net/wow/en/characte...s=is-collected