Thought I'd throw out this online contest I found. Seems pretty easy to do with a decent reward. Just write a logline, synopsis and submit a pitch video (hmmm, now why does all that sound familiar?), then hope people vote for you. It does sound like you might lose some creative control after that, so hopefully it's not a story you're TOO attached to. But I know there's plenty of horor fans on this site, so here you go!
www.massify.com [1]