Guess you could call it hippie crack, but its basically a sage plant. When smoked you basically leave reality and laugh for 5-10 minutes. I can't really find a way to subscribe the experience but if you're actually interested --
herbal-smoke.com
and information on salvia
http://www.erowid.org/plants/salvia/salvia.shtml
http://groups.yahoo.com/group/Salvia/
http://www.erowid.org/plants/salvia/salvia_law.shtml