Actually, I only use sbl-xbl.spamhaus.org
I get 4-5 a day.
My original intent was simply to block people from using proxies, and as I stated in my earlier posts, I had one nut case that had been using rotating proxies and this stopped him cold. He spent two days trying to get back in, and by judging the E-mails I got from him...he was hoping mad.
But yeah, the pleasant side effect has been stopping the spam bots. I never realized I had so many. I rarely got them when we used UBB, and I don't know if was the CGI versus PHP thing, but I suspect it's just the difference in the popularity of vBulletin.