A list of other communities that have local wikis running, sorted in rough geographic order.

Arborwiki - you're looking at it.

Ypsiwiki - Ypsilanti shares pages in Arborwiki, and there's an Ypsilanti front page to guide you to them.

CantonWiki - for Canton, Plymouth, and other western parts of Wayne County.

DetroitWiki - for the city of Detroit and its surroundings.

ToledoWiki - for Toledo, Ohio and the area.