Meanwhile, here are some useful resources for aspiring and experienced horror writers:
DarkEcho: This excellent site for horror readers and writers has been around for ages, run by Paula Guran. Do check out her writers' information and her article, So You Want To Be A Horror Writer?
HorrorMasters Writer's Page contains reference resources of interest to horror writers as well as useful writing links, including horror publishers.
The Horror Writers Association site: The HWA is a worldwide organization of writers and publishing professionals dedicated to promoting dark literature and the interests of those who write it. The site includes a list of writing tips.
So, Who Wants To Be A Horror Writer? is from Edo van Belkom's book, Writing Horror.
The Horror Screenwriter's Page: Established in 1994, this site has a ton of links related to the craft and business of horror screenwriting. The yellow type is a bit hard on the eyes but hey, this resource is free. :-)
If you know of other useful resources for horror writers, please do post them below!