Here are links to other BDSM sites that I've found helpful. I'm no longer keeping this list current, so these sites may no longer be available.
soc.subculture.bondage-bdsm Frequently Asked Questions List The FAQ
for the Internet newsgroup ssbb and a great source of information.
Sadomasochism Isn't What it Used to Be A Portland Top's excellent essay about why we all do SM.
A page listing some music to play during a scene.