I now have an IRC bot in the davical channel on irc.oftc.net that announces updates to the wiki - and lets anyone in channel kill them immediately if they're spammers. It seems to be working well so far: more eyeballs to notice wiki spam, and much easier to wipe it out without leaving unsightly traces in the RecentChanges.

The IRC bot is in Perl, using the POE framework. I guess I should put it in a repository somewhere soon although the last time I published a Perl project +Grant McLean ripped it to shreds in front of an audience!