The collaborative wiki-as-fiction site, Secure Contain Protect (previously), held a contest to determine which entry will get the coveted SCP - 2000 spot. The theme? Science Fiction. Read the winning entry here, and the rest of the alien-spaceship-crashing-memetic-virus-watching-living-TV-show-spreading contestants here.
Seven For A Secret - an anonymous fanfic author creates seven unhappy ( or at least, unconventional ) endings for Disney Princesses by placing them in proper historical, mythological, or thematic context.