I know of one geared more toward the Midwest United States, although people from other areas are welcome to it if they want to know of things going on in the area or would just enjoy seeing the articles posted. We have people in there from Washington state, so it really isn't exclusive to the Midwest, just heavy there.
If you are curious about it, you can PM me. I might be able to put you in contact with some groups in the Western U.S. even if I'm not part of them.