Comment by freehunter

Google does have a campus close to Detroit (Ann Arbor). This is practically on campus for University of Michigan, which is where they do the scanning for Google Books. They employ ~300 people there right now.

http://www.google.com/about/locations/ann-arbor/

There is also a campus they call Google Detroit (it's actually in the suburb of Birmingham). I'm not sure what they do there.

http://www.google.com/about/jobs/locations/detroit/