Nominate implosion: For Best Mechanic/Mutation in Mini 2011: Partition Mafia viewtopic.php?f=23&t=76227
Playing a game where you had to be in groups was incredibly fun and made it more enjoyable. As scum you had to make sure to make the groups right or it would be very easy to lose, and from town perspective they're forced to possibly lynch their townreads to lynch scum as well.
Not sure If this has been done before, the groups thing. But, I think he stated it hadn't been.