Romance writers have theirs, thriller writers have theirs, so do mystery writers and Sci Fi writers .. but not humor writers. That's why no one takes us seriously!
To help the cause, I just set up a humor writers Ning page, called (what else?) ... HA ! Humor Writers. If you're interested in joining yet another writer's social network, bring your Whoopie Cushions and head on over to http://humorwriters.ning.com (don't do the 'www' thing).
I'm the only member so far, so join if you want to have fun or if you just feel sorry for me.