For those of you who know that horror started before the turn of the century, check out House of Usher. This site run by Peter Forrest, of Kanata, has been the "premiere Edgar Alan Poe fan site for over a decade". And he's got the awards to prove it. From bibliographies, to online works, to music inspired by the poet himself, this site is a treasure trove of all things Poe. Whether you're a long time fan, or whether you're new to Poe, you owe it to yourself to check this site out.
And while on the subject of Poe, Feedbooks has a vast variety of Poe's books available for free download in a variety of e-book forms. They also have a great selection of Lovecraft, for fans of that author as well.