I thought it was stated already that the Conj was the only one due to have a class mount? (not that I could complain if they changed their minds)

Also as far as a drake mount there was a teaser image I remember seeing of a unfinished drake with a character mounted on it sometime back in the beta...

http://zantetsuken.net/wp-content/up...gon-riding.jpg

( there we go I found the image again >w<; )