If you ever look at RefDesk.com you might be interested in today's "Site of the Day" it is none other than the Internet Public Library. Of particular interest is the Archives section under the Arts and Humanities. There is a listing for all of the state's official archives: http://www.ipl.org/div/subject/browse/hum03.00.00/ and more.

It began out of the University of Michigan School of Information and is gathering new partners. Check it out, spread the word!