Newsgroups aside, mailing lists and web-based discussion boards all give opportunities for discussing H.P. Lovecraft.

CreepingList

Started by Richard Crawford, this electronic mailing list is dedicated to discussing the writings of Lovecraft and other writers (such as Dunsany, Chambers, and Derleth).

The Eldritch Dark Forum

Dedicated to Clark Ashton Smith, though Lovecraft is also frequently discussed.

H.P. Lovecraft & Cthulhu Mythos Forum

A threaded message base going back to May 2002.

H.P. Lovecraft Forum

One of many forums on Chronicles, a science-fiction and fantasy community site.

H.P. Lovecraft Forum

Just one of numerous forums on HorrorForum.com.

H.P. Lovecraft Literary Podcast Forums

Although this board was designed to augment The H.P. Lovecraft Literary Podcast, discussion covers other areas related to Lovecraft.

The Temple of Dagon Forum

Covering subjects related to H.P. Lovecraft and the Cthulhu Mythos.

Yog-Sothoth.com

Though the site is devoted to the Call of Cthulhu role-playing game, there is much discussion about Lovecraft and his works.