If you're a fan of Clive Barker's Nightbreed, this anthology might be of interest. Median Unmade: Tales of Clive Barker's Nightbreed is looking for stories set in this world. Please note that this is a work for hire and your story can't be used elsewhere (there are a few exceptions) as Mr. Barker has only given his permission for his world to be used in this particular anthology. And they're looking for horror/dark fantasy stories up to 5000 words. The deadline is September 30 and payment is 5cents a word. Please read the guidelines carefully as there's a lot there to consider before deciding on submitting.
UPDATE: For guidelines 6/29/13
Hat tip to darkmarkets.com