Weekly Elimination Game: FunTrivia Knockout! http://www.funtrivia.com/?ref=Taltarzac
Want to test your knowledge of trivia against other trivia hounds? Try entering Funtrivia's weekly knockout tournament. Registration day is Monday, then they run rounds Tuesday through Friday with groups of sixteen players. They are often about 140 groups of 16 playing on any given week. They arrange players by number of wins so that you start out playing people of your own experience.
I have won three of these so far but some weeks I do not even get past the first round.
TOTV also has its own private tournament which you can join.
http://www.funtrivia.com/private/main.cfm?tid=101297 You do have to set up a private tournament account-- just for that specific funtrivia game-- which can be a little confusing.