#SailorMoon
Information on the IRC channel #SailorMoon on EFnet, Dalnet, and Undernet. Also includes member lists, and a FAQ.
#Senshi
Information on the IRC channel #Senshi on Dalnet. Has logs of some previous chats, and image galleries of the characters.
Sailor Mercury Online
Message board with sections for each character, as well as fan works and roleplaying.
Sailor Moon International
Fan community to reunite fans from all over the world. Contains a forum, petitions, faq and multilingual links.
Sailor Scouts United
Discussion of the anime, manga and the new Pretty Guardian tv series. Also contains fanfics, fanart and links.