#4 - April 30, 2008, 7:09 p.m.
... because you don't know what's coming for the profession in Lich King yet?
Probably not a very convincing reason at the moment. Personally I might level enchanting now before the expansion just because it's so expensive to do that you're going to still have time to make up your losses. Buuuuuuuuut... you may be kicking yourself after you see what Alchemy has going for it in the next expansion, or maybe enchanting will be more enticing for you, hard to say.
Hrm.... I would say at least wait until you know what's coming, but that's just me.