It appears that Movable Type has been marking all comments as "junk," regardless of what their spam filtering plugin rates them at, so I appear to have not gotten any non-junk comments in weeks, if not months. I apologize. I've gone through the last couple of entries and published those comments, but it may take me a couple of days to get to the others, and there may be some that rolled off the comment list and I won't be able to find.
I sincerely apologize. I've been wondering why it's been quiet, and now I know.
If you know of a good MT solution for this, email me at blog c/o this site. Thanks.