Added another one. I'll be watching to see how it does over the next few days.
It does automatically what I used to do manually, namely, check applications for membership against the Stop Forum Spam database.
What eventually happened was that the spammers were hitting me with registrations--at least several per hour 24 hours a day--faster than I could check them. I now have a backlog of 3,748 registrations, the vast majority of them spammers. Anybody who wasn't a spammer got lost like a needle in a haystack (sorry!).
Hope this works, because we need some "new blood" to keep the forums going.
I will also be linking this forum to a blog, so that you will get some fresh articles to read, probably a couple times a week, in addition to other posts.
And I'll be updating the forum software within a few days or weeks.