ASciFi.com: The Science Fiction Forums
Message boards for a variety of series, including Farscape, Stargate, and X-Files.

Coffeerooms(sm): Jolau's Sci Fi Board
A gathering place for friends and fans of science fiction television.

Tigerclaw's Crossfire
Fans debate burning issues such as whether Imperial Star Destroyers from Star Wars could defeat Star Trek's Galaxy-class starships in combat. Includes polls and a variety of message boards.

The Fringe Posting Board
Discussion forum for fans of anime, Buffy the Vampire Slayer, Angel, Babylon 5, Highlander, Stargate SG-1, and The Tomorrow People. Includes polls and fan fiction.

Xena and Hercules Universe
Science fiction, fantasy, and fan fiction message board.

Slayer Boards
Message forums boards series including Buffy The Vampire Slayer, Angel, Farscape, and Star Trek. Threads include role-playing and other games.

Psi Fi
Discussion board with threads on shows including Andromeda, Enterprise, Psi Factor, and Buffy the Vampire Slayer. Also offers discussion on space and science news, as well as tape trading.

Fantastic Television
Message board and chat room for fans of science fiction and fantasy shows.

PsiProne's Sci-Fi Nexus
A Sci-Fi, Fantasy and Horror forum, includes special help forums for webmasters.

Flare Science Fiction Forums
An old, large Star Trek-turned-Sci-Fi community seeking new members. Formerly known as the Starfleet Communications Relay and the Behaviour Group Forums.

Yahoo! Groups: Sci Fi Junkies
Message board for fans of Stargate SG-1, Enterprise and The Dead Zone to discuss how much they enjoy watching the shows. Includes photos and polls. [Yahoo! registration required.]

Othala
Multi-fandom forum with threads for Stargate SG1, Stargate Atlantis, Red Dwarf, and Manifest Destiny.

Astro Gate Forums
Message board with topic threads including Andromeda, The X-Files, and Stargate: SG-1, as well as discussion of science and science fiction in general.