List of communications channels
Private channels 
Mailing lists 
Most private wiki projects (above) have an associated mailing list.
Other private lists: staff-l (wmf), private-l (wmf), legal-l (defunct)
Old or defunct lists not associated with a project: intl-l
IRC channels 
There are IRC channels for many subgroups of wiki participants based on their flags and permissions. Some are invite-only.
- -admins channels by project
- ##stew for private steward communication
- wikimania-planning at times for private wikimania discussion (this has also changed names year by year)