This has to be some kind of landmark of incomprehensibility - I've gotten spam that
- has purposely misspelled words
- has lots of real words in random order in the text
- has lots of real words in hidden html fields
But now, I've just gotten a spam titled:
What the heck is that supposed to mean?
Update: In my comments, Laurent Bossavit points to Charles Miller's explanation of this sort of thing. It's the spammer in question trying to defeat spam filters, and - in particular - the Bayesian filters that have become popular.