SPOILERS: Those who are signed up for the "Red Rover" scenario @ Origins 2011 (as per 
http://apocalypse-world.com/forums/index.php?topic=1627.0) LOOK AWAY!
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Okay, so Red Rover is an AW convention scenario based loosely on 
Needful Things, 
Faust, and all the other myriad "devil's bargain" fiction out there.  Effectively, I'm having the players generate a holding – against which I already have a few general Fronts – that then meets the lone individual Red Rover who seems to have everything they need (and who cannot just be murdered and looted).
Anyways, here's how it works:
• Every time a character fails a Move roll, they get 
1-temptation.  A point of 
temptation means they cross paths Red Rover somehow in their next scene, and each point 
subtracts one from the Devil's Bargain move below.
• If a character calls Red Rover by 
his true name in dealing with him, they get +1 on the Devil's Bargain move.
• 
Devil's BargainWhen you 
make a devil's bargain, roll+weird-temptation.  On a 10+, you get whatever it is you want from the devil and the devil gets 
1-hold on you (as per the Touchstone playbook), which you can get rid of by exposing one of the other characters in the holding to harm/cost or doing what the devil suggests in a future scene to mark 
1-experience.  On a 7-9, you get what you want, but only over a hard bargain AND the devil gets 
2-hold on you (see above).  And if you fail...
(BTW, the scenario largely centers around playbooks with low weird scores...)