I don't know if you've seen the latest Bungie update, but in it, they announce that Grifball is being added as an official Halo 3 gametype this weekend.
Thought this was great information for anyone who is wanting to start a team in the Grifball league. If anyone is interested in starting a team hit me up.
Also check out Grifball.com for more Infromation.
Snakexeyez