Minor rant here---I hate that there's no ready option in blogger to allow anonymous comments without moderation or captchas if and only if they have no links attached. An awful lot of stuff lately is leaking through the spam filter. I really don't want to disallow anonymous commenting, I hate captchas, and I don't want to moderate most things. For the time being I've enabled moderation on posts older than 3 weeks or so. Hopefully the Great Flood of spam is a transient thing.