Realtime Black Lists

So I was wondering -- what Realtime Black Lists does everyone use to combat spam? I'm currently using: relays.ordb.org and bl.spamcop.net but I'm sure there are others out there that I might benefit from. Between the blacklists and SpamAssassin, a good deal of spam dies before it gets to my inbox, but I would like to see more get caught. So what do you use?