Bungie Central is hosting an online Halo: Reach Beta Tourney is support of the charity of your choosing. That is, if you win. More details inline below.
"Thousands of players will be playing the Halo: Reach Beta for the next two weeks. We thought this would be a great opportunity to raise money for charity and award some participants with Bungie swag, Halo: Reach Legendary Edition pre-orders, Microsoft Points, and much more. In order to make this happen, we're asking you to donate at least $5 to participate via PayPal.
There will be no more than four rounds in the tournament. Once you've registered, you're all set. Check the Bungie Central forum to make sure you're on the tournament bracket. The schedule for what date and time you'll be playing will be posted there on May 11th, if not sooner. If you can't make it, you may be able to be re-scheduled. If not, you'll be added to first priority on the substitutes list."
Halo: Reach Beta FFA Tournament