The spambots are getting numerous and belligerant. While the blog has an anti-spam plugin that gets the majority of them, some still get through up to the stage of requiring moderation. More than 260 spam comments were blocked today, with more than a dozen making it through to moderation. *This* is why your first message must be moderated and accepted… otherwise, there’d be far more spam comments on the blog than actual comments.
The vast number of spam comments, though, means that some actual messages will get lost. If you try to post a comment with multiple links, it may well get dropped in the spam bucket. And of course first time commenters have to compete with spam to get noticed.