Comment spam continues to evolve. I think spammers are learning the more general and succinct their comments are, the better they may be mistaken for real comments. Sometimes, I’m seeing the only tipoff is the link they leave in the link box.
But what if that link goes to a site you know, but to a page of user-supplied content? Like a twitter account just made by a bot, or linkedin account, or myspace page? Eventually you lose, either by being suckered or by swatting away what might have been a real post!