The Genvid Project: The Sailor Moon Soapbox - This site is the place to go for the latest PGSM news, as well as detailed synopses of the episodes within a day or two of the episode airing and translations of the interviews, diary entries and other little things found on the various official sites. There's also an excellent discussion forum. Any PGSM fan who doesn't visit this site regularly is missing out!

Shingetsu - A site with a lot of content translated from Japanese sources. A great place to get episode transcripts and synopses fairly soon after the episodes air.

Serecindra's Sailor Moon Live - A site with episode synopses that have lots of pictures. Lots and lots of pictures.

Sailor Dream - A great site with a lot of very well laid-out information about PGSM.

Pretty Guardian Sailor Moon Media Page - A site with great music downloads, among other things.

The Sailor Senshi Page - An excellent Sailor Moon site which now has PGSM content, including video clips, illustrated synopses of the episodes and character information.

Japan Hero - A site about Japanese tokusatsu series, including PGSM. Has pictures and video clips.

Pretty Guardian Sailor Moon Cast - An interesting site that focuses on the cast of the series.

Other sites that are worth visiting:

Eternal-Moon.org
Moonlight Fortune
Forever Senshi
New Moon Guardians
Pretty Guardian Sailor Moon Live Action Page
Moonlight Princess

Sailormoon Channel - The main official Sailor Moon site, which covers every aspect of Sailor Moon, including the live action series. Well worth a visit if you speak Japanese, a mild curiosity if you don't.

CBC: Pretty Guardian Sailor Moon - A site by CBC (the television station, who I believe also contributed to its production). This is the site with daily diary entries from the actresses playing the Sailor Guardians.

Fly Me to the SAILORMOON - A site by Toei, the production company behind the series. This is the site that has interviews with various members of the production team, not to mention a snazzy Engrish title.

Sailor Moon Uncensored - A great site that compares the English dubbed version of the Sailor Moon anime to the original Japanese version. There's a also a forum where various things related to Sailor Moon (and other subjects) are discussed, including PGSM.

DIES GAUDII - A site that discusses the various mythological and etymological aspects of Sailor Moon, most notably investigating which are the correct name spellings for lots of Sailor Moon characters whose names are spelt all kinds of different ways on the internet. Even if not everyone agrees with all of his conclusions, this is a site that anyone who considers him/herself a big Sailor Moon fan should read thoroughly.

Google Groups: alt.fan.sailor-moon - If you have proper newsreader software, you can use it to visit alt.fan.sailor-moon, a Sailor Moon newsgroup which is currently full of discussion about PGSM. If not, you can use Google Groups to read and post to the newsgroup instead.

Devoted to Digimon - A Digimon site with an ever-growing wealth of information, including detailed episode summaries and comparisons between the original and dubbed versions. If you're interested in Digimon, this is a site to visit.

Henshin - A very informative site about mahou shoujo (magical girl) anime, a genre that Sailor Moon falls into.