Everybody's an untrusted commentor now...
Finally gave up fighting comment spam the recommended Movable Type way (which frankly doesn't work) and have installed a plugin which requires that I trust commenters on their first comment in order for them to avoid moderation thenceforth.
Unfortunately this means everybody's in that bucket until I pull you out. If you see the moderation message, please let me know so I can trust you.
Update: Of course, it's not working. Just email me and I'll manually moderate until I figure it out.