id be surprised if someone hasn't already posted this, but lurk on erowid.org.

you'd be surprised. my friend had this plant in her backyard all summer. and a while back i saw a picture of it on erowid. apparently its a hallucinogen. but its got traces of cyanide in it, so im not really so up for fucking around with that.
but yeah you'll find a lot of information on homemade drugs on there.