A "Musical Chairs" game has finally been tried (on another forum) and is doing well. Thisis where the last person to upload their turn is automatically set "stale". One thing of note is that the last person to turn intheir turn usually gets to be the first person on the next turn so its rarely the same person multiple times in a row.
Also Im not sure if this has been mentioned but here is an interesting thread about creating a Dom3 game based on the "Survivor" TV shows.
http://forum.shrapnelgames.com/showthread.php?p=730681