I'm 371 Alchemy...and I still haven't had one.
Not one.
I've made well over 200 potions/elixirs (Mad Alchemist's, Unstable Mana, Volatile Health, Major Healing, Major Agility, Draenic Wisdom, Major Defense, Super Mana, etc...even the 5 Major Dreamless Sleep for my potion mastery quest.)
I don't sell any herbs...I gather them, I stockpile them in the bank for a while, and then when I've got some time to kill I buy some vials and make some potions, etc.
I've only done 5 or so transmutes (Earth -> Water, Earthstorm Diamond) and no discoveries there either, though I'd have to say I'm not surprised about that given how few I've done.
Is it common to go so long without a discovery? I've got 2.5 stacks of Ancient Lichen and 6 Fel Lotus sitting in the bank that I'm itching to use on something cool, but I'm almost starting to wonder if I'm not doing something wrong.
Edited, Mar 19th 2008 3:15am by AureliusSir