Personally, I like the idea of multiple teams. I like Marvin's and Shadowtester's ideas. While I think its a good idea to rule out team/player swapping during a race--I think its a bad idea to prevent any new comers from joining. On that note, I suggest that new members be allowed to join during the course of a race---but that they are automatically assigned to the team generating the least points. That way new members/folders are Welcomed and no 1 team is stuck in the position of last place all the time. Think of what would happen if WFO joined in the middle of a race--the Last Place team may very well win!