If anyone's interested, there is an active, enjoyable tournament on the uk.games.video.xbox newsgroup. Its a stroke play, weekly affair, now into it's third week, and the fourth round, which starts Saturday, has become 64 player due to over-subscription of the 32 player rounds.
If you want to join, go to the newsgroup and look for a thread entitled 'Links UGVX Round IV', post your Gamertag, and you'll be sent an invite by the host FourFootOne (is invites only competition). May keep you going while waiting for the AV Forums league to get off the ground...