I just heard about this site called Critters.org, it's a community of writers who read each other's work and critique it.
This comes from their FAQ page:
"We'll look at anything science fiction, fantasy, or horror related, in whatever form -- plays, screen plays, poetry, whatever. We've had them all. Even novel query letters & synopses you might send to editors are fine. Not as many members work outside of the short story or novel form, so review rates may be lower, but they're absolutely welcome."