Please contribute to anything I've missed, although note that this listing is not meant for single character or person blogs or websites, but rather things that any member of the community can access and use.
In-game chat channels
These chat channels are intended to be used by RPers to get in touch with each other. Please use them and spread the word!
Horde: /join soeooc or /join hordeooc
Alliance: /join rpchatter
WordPress Community channels: /join soewp (Horde & Alliance)
These are a collection of websites intended to be used by the denizens of SoE to get in touch.
Official Sisters of Elune forums (o-boards): http://us.battle.net/wow/en/forum/1182400/
Unofficial community forums: http://www.sistersofelune.net/
Sisters of Elune Writing Community: http://soewc.freepowerboards.com/ (seems to be dead, but perhaps we can inject life back into it?)
Wowpedia page: http://www.wowpedia.org/Server:Sisters_of_Elune
Facebook page: http://www.facebook.com/#!/group.php?gid=96259376741
Pertinent O-boards posts
Horde roleplayers: http://us.battle.net/wow/en/forum/topic/1074097885
Alliance roleplayers: http://us.battle.net/wow/en/forum/topic/1074097858
Regular RP events: http://us.battle.net/wow/en/forum/topic/2228418866
Guild directory: http://us.battle.net/wow/en/forum/topic/2228418866
Blogs, websites, and Twitter feeds listing: http://us.battle.net/wow/en/forum/topic/2369742725
Blogs run by and/or for SoE community members.
Sisters of Elune WordPress Community: https://soe4rp.wordpress.com/
Twitter accounts and feeds that are by or for SoE members.
SoE RP List (A/H): http://twitter.com/Daphne_West/soe-roleplay
SoE RP List (A): http://twitter.com/Daphne_West/soe-rp-alliance
SoE RP List (H): http://twitter.com/@BellaBoldvalor/soe-rp-horde
#sistersofelune hashtag search: https://twitter.com/#!/search/sisters%20of%20elune
If you have anything you need or want listed, let me know!