So since we have a 10 day rental of the tribes servers. I went ahead and open one of them up now. It is running the configure for the tournament.
Server Name: LANOC Practice Arena Server
Password: lanoc (not hard I know)
Class Limits: none
Level Limits: none
Single match: best 2 of 3 rounds (I haven't tested this yet)
Maps: Lava Arena, Walled In, Air Arena
if you go in to Play, and then customer servers, and turn off all game types but arena and filter by owner to all, there were only a screen full just now, and it was easy to see.