Wait For It
AdvanceStory is a gradual release system for fiction. It pulishes a few letters of a written work every fifteen minutes, and goes faster the more people are waiting for it. AdvanceStory is currently in an early test phase, with a 'story' which is machine generated, titled 'Hallucinations of a TimeAccessor'. The ability to rate completed chapters is coming soon.
Other site features:
Random Name Generator, generates names for characters, including titles. These might be useful for a sci-fi/fantasy setting.
GrapevineGrapevine, the surreal public chat system.
HyperWaitForce, an experimental multiuser interactive exploration simulator thing. There's not much to it.