Spam: The new hash-busting, Bayes-avoiding, spam evasion trick: inserting random dictionary words into the middle of another word. Like so:
Subject: SPAM(30.8) Be your own bovertigoss...
and
Subject: SPAM(29.6) Earn huge monteleostey quickly from home...
I'm not sure exactly why increasing monteleosity (something to do with the intensity of light emitted on a mountain, I think), and becoming a bovertigoss (a kind of antipodean rodent) would help me, though. It certainly isn't helping the spammers -- both messages were autolearned as spam on arrival.