As long as we're creating customized Monopoly boards for everything from Cars 2 to Harley Davidson, we might as well have a version that lets us act out the film The Princess Bride. It's unfortunate that this edition doesn't actually exist, because it would be perfect for challenging your enemies to a battle of wits.
Possible Miracle Cards?:
"You are not left-handed - advance 3 spaces."
"You are involved in a land war in Asia - pay £500."
"Life is pain, highness - go to Pit of Despair."
"Anybody want a peanut? - Collect one peanut."
"There's a shortage of perfect breasts in this world - donate 1 perfect breast."