the rules might need amending though in my personal opinion as conversation has and will wander over to discussion about using these devices as a delivery method for other substances, whether it is a recognised medicine, alcohol or what-ever else.
we have recently had a debate as to what to re-name them officially in part so that their name encompasses these other uses. personal vaporizer or portable vaporizing device have been considered as well as others.
from my understanding also, salvia is not banned across the boards and legal in most states. it is a different kind of drug than nicotine or alcohol but it is still a drug like them.
also, i can't remember what temp the atz burn at, but i know it has been discussed before. maybe a search would turn up some results.