The mashup feature, currently in beta, makes a new random "mashup" scam email every time the page is loaded. It does this by combining single lines from messages selected out of our database of more than 10,000 specimens.
(Right now the mashups begin "Dear Sucker" and end "Not My Real Name," but that's just for fun while we work out the details. The randomly selected lines are the important part.)
What else could we do with this feature?