Banana Shoulders writes a great blog and has a great guide list for leveling the new Profession of Inscription for WotLK which arrives as of patch 3.0 when it goes live. It looks to be a fun profession or for a Alt as well. So here is the links so you can head over there and get cracking for a head start in preparation.
Inscription Guide Leveling
Inscription Leveling Guide V1.2
If your a Herbalist like me get cracking picking flowers and making profit because Inscription will not be cheap. Glyphs are also not cheap either in Beta either. Hell Alchemy may get even more expensive if anything or profitable.