The Barony of Northkeep has a discussion list for the community interaction among the members of the list. You can sign up for the list at the Northkeep Info Page. Please follow the instructions there.
The rules of the list are fairly simple: No spam, no fighting, no signing the list up to crossposting humor lists, no mundane politics, and no spreading rumors unless you can and are willing to substantiate them publically.
The Canton of Chemin Noir (Bartlesville, OK) also has a discussion list.