I'm currently playing in a Conjurer's Chess that is a hell of a lot of fun - but we're missing a few more players. Maybe I can interest someone here on ENWorld? 
Conjurer's Chess is just that... two summoners on opposing sides of a chess board summon monsters for a preset number of rounds. Those monsters then fight each other and whoever has more squares occupied with his monsters when the match is over, wins.
Summon Monster, Summon Nature's Ally, Summon Desert Ally, Summon Undead, Conjure Ice Beast - all these spells and more are options.
Currently I am playing a level 6 cleric, but we'll be leveling to 8th at some point in the (near) future.
Here are the rules (warning - longish):
http://www.dragonavenue.com/forums/viewthread/545/
Books allowed and character creation (excerpt from the rules):
http://www.dragonavenue.com/forums/viewthread/635/
Here are the characters which are competing so far:
http://www.dragonavenue.com/forums/viewthread/546/
And here's a match as an example:
http://www.dragonavenue.com/forums/viewthread/630/
When you take a look at the venues and the matches that have taken place, you'll note that the DM is doing a simply awesome job with this tournament.
If you want to join in on the fun (with a 6th level character currently), simply post in the discussion thread.
Thanks!

Conjurer's Chess is just that... two summoners on opposing sides of a chess board summon monsters for a preset number of rounds. Those monsters then fight each other and whoever has more squares occupied with his monsters when the match is over, wins.
Summon Monster, Summon Nature's Ally, Summon Desert Ally, Summon Undead, Conjure Ice Beast - all these spells and more are options.
Currently I am playing a level 6 cleric, but we'll be leveling to 8th at some point in the (near) future.
Here are the rules (warning - longish):
http://www.dragonavenue.com/forums/viewthread/545/
Books allowed and character creation (excerpt from the rules):
And here are the venues where the conjurers battle one another:6) Summoners are to be 6th level (including LA), are created using 32 point buy, and may be drawn from the following sourcebooks:
Core 3
All “Complete” books and all “Races of” books
The “environment” books of Stormwrack, Frostburn and Sandstorm
The Planar Handbook
Libris Mortis, the Draconomicon, and Lords of Madness (note that the Pseudonatural Template for the Alienist (CA) will be drawn from Lords of Madness)
Magic of Incarnum
The Fiend Folio and the Monster Manual 3 and 4.
http://www.dragonavenue.com/forums/viewthread/635/
Here are the characters which are competing so far:
http://www.dragonavenue.com/forums/viewthread/546/
And here's a match as an example:
http://www.dragonavenue.com/forums/viewthread/630/
When you take a look at the venues and the matches that have taken place, you'll note that the DM is doing a simply awesome job with this tournament.
If you want to join in on the fun (with a 6th level character currently), simply post in the discussion thread.
Thanks!