http://www.informationweek.com/story/showArticle.jhtml?articleID=170700328
My favorite quote from the article:
"This list is quite a surprise!" said a Roaring Penguin spokesman, "we have no idea what ndsfrwudG is. It could be a code added to a URL for tracking purposes, or it could be 'random' noise added to confuse Bayesian engines."

Top 10 Spam Words For July

   1. ndsfrwudG
   2. Tadalafil
   3. gation
   4. ruptcy
   5. obli
   6. morta
   7. remov
   8. ffffd5
   9. edit1
  10. display-variation

 I honestly don't know how people decipher the spam enough to buy whatever it is they are trying to sell.