DorothyL – Information about the discussion mailing list. Includes archives, posting details, and links to related sites.
Femmystery – Group/list for discussing female authors who write mysteries with female protagonists.
Mystery – A list for the discussion of spy/mystery/private detective/police books, both fiction and non-fiction.
4 Mystery Addicts – An international forum for the in-depth discussion of crime fiction.
Rara-Avis – Members discuss hardboiled and noir writing.
Women in Mystery – Yahoo group dedicated to fiction by women writers and/or novels featuring private investigators, police detectives or tough women sleuths.