Brite, Poppy Z.
Hamilton, Laurell K.
King, Stephen 
Lovecraft, H.P. 
Oates, Joyce Carol
Preston, Douglas & Lincoln Child
Buried.com - fiction and film reviews
Dark Echo - reviews and interviews; some horror, but leaning toward dark fantasy
Horror World - reviews, news, interviews, and more
Horror Writers Association - reading lists, conference info, links, and more (includes a list of horror publishers)
Necropsy - use the author and title indices to track down loads of reviews
Fonseca, Anthony J. (2003). Hooked on Horror: A Guide to Reading Interests in Horror Fiction. Greenwood, CT: Libraries Unlimited.
Herald, Diane Tixier. (2005). Genreflecting: A Guide to Reading Interests in Genre Fiction. Greenwood, CT: Libraries Unlimited.
Saricks, Joyce. (2001). Readers' Advisory Guide to Genre Fiction. Chicago: ALA Editions.
Spratford, Becky Siegel. (2004). Horror Readers' Advisory: The Librarian's Guide to Vampires, Killer Tomatoes and Haunted Houses. Chicago: American Library Association.
Wisker, Gina. (2005). Horror Fiction: An Introduction. New York: Continuum International Publishing Group.
Contact Phil at pneskew [at] indiana.edu