It's been almost a day, and my feeling is that if FF were around we'd have heard from him, so I think I'll post up my idea and see what everyone thinks.
I was thinking of a "night of the living mafia" theme.
Basically a standard game with dr/det/vig (one time hit) vs mafia (hit each night), with the zombie twist. When a townie is lynched they will come back as a zombie. They can't post in the thread (Zombies can't talk), but they get a hit the night following their lynch. They can choose not to use the hit, but regardless will be discovered by the town and killed that night. The zombies have no affiliation to the town or the mafia and win if their hit determines the outcome of the game for either the town or mafia teams.
Let me know what you think. I can get it written up formally and a sign up posted by tomorrow if peeps like it. If not, we can just do a standard game.