In case you didn't know, we're hosting our first Halo 3 tournament for many North American residents next week. Registration closes on Monday at noon PT. There's currently a couple of slots left open and many of the teams are looking for waitlist players to join their timeslots. In case you're wondering, waitlist players are considered substitutes for the duration of a tournament. This means that you have the opportunity to play in a future match if a player can't show for a round. Read the FAQ for further details on how substitues work.