Master Enchanting

Damn, forget the quick-reply didn't work, so it's gonna be a little more compressed this time:

You have to be lvl 35 to get Artisan training (= possibility to reach max level of 300 in enchanting)

First of all, get Atlas.

Second, get a high-lvl friend, most classes can do this, but I'd prolly take a warrior, mage or some other class that can deal AoE dmg. Go into Uldaman, and follow the path to the place Atlas tells you she is. She will not be there, but a lot of scorpions will. Kill these, and the trainer will appear.

Happy enchaning.

P.s: http://www.xs4all.nl/~brt/wow/guides/skillupenchanting.html is a very nice and informative page on enchanting. It will tell you what materials to bring, so you wont have to go there multiple times.