wikipedia has a good page on it.. erowid.org is great for experiences

http://en.wikipedia.org/wiki/Salvia_divinorum

http://www.erowid.org/experiences/su...ivinorum.shtml

and then a nice salvia guide once you've got some:

http://www.sagewisdom.org/usersguide.html

Thats about everything you need to know about salvia.