Startrekthewebsite.com Forum - Includes topic threads for each series, as well as for games based on the shows. - http://s3.invisionfree.com/Star_Trek_Forum/index.php
Chick616's Star Trek Forum - Forum which includes sections on the series, fan fiction, movies, and humor. - http://startrek.conforums.com/
StarTrekFans.net - A moderated message board to discuss all aspects of Trek. - http://www.startrekfans.net/
StarTrekVoyager.com - Discussions of current and past series, fan fiction, news, gaming, books, and fan art. - http://www.startrekvoyager.com
Scifi.com: Star Trek - Message board sponsored by the Sci Fi Channel. - http://www.scifi.com/bboard/browse.cgi/1/5/753