there are also luciferian satanists, theistic satanists and diablorists...

http://www.angelfire.com/ny5/dvera/

these guys are particularly interesting, even if they credit belial with more worship than satan, in a more, traditioanlly dramatic style of worship and offering.(personally i'm more fond of him too.)

http://www.geocities.com/jhanshermann/rituals.htm

satanism is going down the road of wicca...anyone with an itch to worship and a plan to sell to others, has his/her own religion.