writingthewall - for meta and discussion about RPF. Multifandom, has had some really interesting comparative talk about how different fandoms operate.

punditfic, andthatstheword, thosestoriesplus, punditkink - assorted fake news/punditry comms. (In spite of the name, Punditfic is more fake news oriented; the pundit-focused writers mostly congregate in Those Stories Plus.) There's also a fandom primer with more comms listed.

roleplayreport - one fake "Stephen"'s views on LJ, DW, and the roleplayers thereon.