I was dissapointed a while back when i specced balance, and found out i couldnt mount in moonkin, and was delighted, even though its stupid looking, when i found this out:
Requirements: Orb of Deception, A balance druid, or some nog.
1) Go into Moonkin/Or use nog until you get the skell buff.
2) Use Orb of Deception
3) Mount up
4) Right click-off the orb of deception buff
5) Huzzah!
Moonkin looks quite silly, as it stands up on the mount :P. It also works for Wyvrens/gryphons.
Im not 100% sure if this still works, havent tried it in a little while, and im not balance spec anymore, and i just tried 5 times to get skell buff (the one time i dont want it, every other time i get skel), and now i need to get to MC (Ugh!).