Apologies for broken commenting system! It's fixed now.

I owe great apologies to anyone who's tried to post a comment, only to receive a message about the spam filtering system being unavailable. I found a misconfiguration in the filtering set-up; it's fixed, and comments appear to be flowing once more. 

FYI, the spam-filtering system used is Mollom, which offers a nice benefit: It analyzes the text of comments, and unless it finds reason to suspect spam, won't bother you with a "captcha" or other "prove you're a human" test. I'd like there to be as little annoyance as possible for those kind enough to leave a message – which is why I'm very chagrined to find I've been unwittingly slapping down those good people for a long time now.

My apologies once again. I do look forward to your thoughts on what's good, wrong, or just plain dumb in this site's content.