I just got an email this morning about how the commenting feature here wasn't working right; and sure enough, after digging through my Movable Type settings, I realized that I had it set up wrong. Anyway, it's now fixed, so comments should now get through; although please realize that they're still moderated by me, so there can sometimes be a delay before they're posted. (Once you've posted one good comment, though, you're put on the "trusted" list; future comments get published immediately.) Sorry about that!