Siha at Banana Shoulders put up a fantastic guide to leveling inscription.
Using this guide I plan to drop skinning on my priest and take up Inscription. I heartily recommend you take a look - even if your not interested in trying it out.
In my case, I was NOT interested in leveling an Inscriber… but now I am!
I have a herbalist mage that can easily stock up everything, and will be working with my wife who is a herbalist throughout northrend.