I've been a DM for a while for 3.5. I've run many NPC characters, however only a small fraction of monsters out of the books (comparatively). Also, I like to use templates liberally as well as advance creatures for legend/bounty purposes. I don't know many who game around where I live or on the net, and most of those I do know I'd rather spring a monster or encounter on them by surprise instead of needing them to playtest it first. Kind of loses a lot of the shock factor, if you know what I mean.
Is there any site or group online that has said "yes we don't mind being crushed by or crushing monsters in arena battles?"
Edit: I'm looking more for people who are willing to play a quick-and-dirty combat for me to measure different monster power. Currently I would prefer people who are willing to play with pregens against a creature I have (I'd supply the pregens) but in the future I'll be expanding that to include people who would rather make their own. Since min/maxing heavily manipulates playtest results I want to avoid somewhere which is exclusively that. In summary, right now I'd like to find people who are willing to help me test these characters against this monster. Barring that, if I can find people who want to use their own characters that would be fine as well.