I recently learned about the following resources in Michigan, and I hope this will be helpful to others:
http://www.AspergersMichigan.com (a site maintained by Richard Howlin, Ph.D., a psychologist in Dexter, Michigan who specializes in AS -- Dexter is located between Ann Arbor and Jackson, I think it's around exit 167 off I-94)
http://www.med.umich.edu/playproject/map/directory/strategies.htm (a list of interventional and therapeutic resources for AS/autism in SE Michigan)
http://www.autism-asperger-associates.com/pages/1/index.htm (a firm based in Grand Rapids that specializes in social skills classes, OT and parenting classes; classes are held in various locations around the state)
If anyone knows of other Michigan resources, please post them here!