I mean, one that doesn't make you want to kill and eat everyone else on it or at least tell them that if they ever touch a keyboard again you will chop their hands off?
I have been having a rummage round for such a thing and found one or two, but the standard of work being shared and discussed is so utterly dreadful that I don't really see the point in joining in. I know that an awful lot of people who 'want to write' should probably be encouraged to take up masturbation instead, but there must be some reasonable forums out there.