The Center for Citizen Media got a very stealthy piece of blog spam, and noted that Akismet (the WordPress blog spam filter) caught it anyway.
This wouldn’t be very interesting, except for the fact that automation was suggested. A blog spammer can be a pain in the ass, but a spammer with a tool that scrapes sites for familiar keywords, terms, and other defining factors that can then be used in the spam itself makes it really interesting. A small database of key phrases for injection, some word substitution scripts, and you’d have a real powerhouse for filling up junk comment and trackback tables.
Or maybe the spammer just read the “how to” before they did this to CCM?