Dr. Dave, author of the excellent Spam Karma plugin for WordPress, has posted The State of Spam [Karma] in response to a new breed of spambots. (These sneaky %#@!ers hit this site on Friday, so I installed the 2.2 beta. They seem to have stopped trying over the weekend.) Anyway, Dr. Dave is holding a donation drive to help cover future versions of Spam Karma. I think it’s worth at least a few bucks.
FWIW, I use Spam Karma and Bad Behavior to block comment spam on this site.