I think Compound would make a good co-GM for this bout. He did a great job with the rules for Presidential Fell-Just-Short-ers Mafia, after all. Again, I'm sitting out until I get my school's workload organized, so me taking on the co-GM would be a very poor lapse of judgment.
Can I make a suggestion, though?
3) The roles? The Donkeys and Elephants are our Mafia families. Informants are now "Spin Doctors" and Vigilantes... er, let's call them Liddies, I guess. You could probably pick better names than that.
Unless Thom decides to do this when he announces "deaths":
Dim of the Yard has been eliminated from the campaign. She was a Spin Doctor (Informant).
... Then I would suggest changing the name "Spin Doctor." I'm assuming that this game has normal rules, but this would help to cut down the confusion regarding the roles of the Informant and the question of whether or not the Doctor will be making an appearance in this game.
Again, you don't have to change it. Just a suggestion. If you do decide to change the name, though, my suggestions are "Proponents of Spin" and "Talking Points."
Edit: And this is all, of course, assuming "Presidential Race" wins the bout for Mafia. Forgot to mention that in the original post. Oops.