I've used Salvia a lot. I've used it as just dried leaves, 5x, 10x, and 20x. I would reccomend using higher concentrations and smoke less of the plant material. It is very interesting stuff although I would not call it recreational, due to the nature and intensity of the trips. There are a bunch of trip reports at http://www.erowid.org put on your critical thinking caps before you just believe what anyone says there. For me the trip usually includes thought exchanges with a female entity.
Rhizo
Rhizo