Most of you reading this will already know about it, but for the few stragglers who might want to jump into the fun, here's the story.
Lady Jane (emjayne) has started a confessional post, where anonymous posting is encouraged and logging is disabled. Bare your soul, laugh at or with others, say things you'd never dare say in the open. So far, it's up to 700 comments, and it can be found here.
Have fun :D