ArborWiki.org is a freely editable community resource for Ann Arbor, MI
ArborWiki is a publicly-editable CivicWiki for Ann Arbor, Michigan and other towns in Washtenaw County, Michigan. The goal of ArborWiki is to collect facts, figures, memories, and visions about anything local to the area.
Popular pages on ArborWiki include:
A comprehensive Streets of Ann Arbor project allows you to navigate most of downtown by intersection -- very cool!