No. But it would be a neat idea. As an uber recipe kind of thing...like flasks for alchemy, etc...
I did recently have a neat or perhaps stupid idea to allow an enchanter to enchant a mount....so you could enchant one with the ability to carry a tauren (YAY!), or a bit of a speed boost, or lower summon time, etc...
But then maybe enchanters would be TOO good at money-making :P
Give it to alchemists I say...put a mount on steroids so my tauren shaman can ride an undead steed.