I just added reCAPTCHA to the blog, which should cut back on some of the comment spam issues around here immensely; this solution means your commenting also has the nice side-effect of helping to digitize old books that can’t be OCRed reliably by computers.

Since this should eliminate the spam problem, I’m also going to allow comments on posts up to four weeks old; the previous limit was 10 days, which might have been a tad short. Please send me an email if something is broken; my testing was reasonably thorough (considering it only took me about 45 minutes to add the code, since there wasn't much to do at my end), but you never know on these things.

Thanks to Adam Rossi-Kessel (via Planet Debian) for the tip.