The Barrysworld Jedi Knight 2 league (BWJK2L) is entering its second season, if your a clan looking for a challenge and think you can produce a team every week then check out
http://leagues.barrysworld.net/bwjk2l/)
The league is a TFFA league with a minimum of 5v5 with the possibility of larger matches at the agreement of both clans (like most of the settings).
From experience I can say this is a very well organised league only let down slightly by the odd clan who couldn't cut it and produce a team regularly.
I look forward to kicking your ass :p
(j/k, kinda :D)