The Mac Power Users community which I have been helping to moderate has a wonderful new home on Discourse. The Facebook group has been archived (which means it is still there, but in read only mode), and talk.macpowerusers.com is already exceedingly popular. I know a large number of the Mac Power Users fans are not Facebook users and hope that they will join this community.
Here are some of my posts which I have created so far:
And here are some useful help posts: