A suprisingly mature and interesting community of webforums at http://www.xforums.net
Known for how quickly they go
off-topic (sometimes as soon as the first reply) and the really strange group of people who has gathered there. There are psychotic accountants from
Boston,
University students from all over the US and Canada, a bunch of
artists of various breeds, a couple of hardcore geeks, some international posters, and a suprisingly laid back atmosphere. The only rules that much attention is paid to are the ones concerning correct use of the english language and the ban on prejudice and bigotry. Other than that, almost everything is fair game.
X-Forums is also the host to the forums for the webcomics
Something Positive,
Queen of Wands and
Psychic Dyslexia Institute.