Here are a few Evo forums.
www.evolutionm.net <- biggest one around
www.evolutionforums.com
www.norcalevo.net <- local to Norcal (duh!)
www.socalevo.net
Speaking of NorCalEvo.net, we are having yet another Evo gathering and we are inviting Zilvia.net people along. I will post up the details ASAP.