In Michigan Ann Arbor has a large startup community and ecosystem. Most of the states VC and angel community is in Ann Arbor.

East Lansing has a small but very active and growing community, check out the group Hackers and Hustlers on Facebook. The city of East Lansing sponsors two incubators, a regular one and another which is limited to MSU students.

There are also small communities in Grand Rapids, Midland and Kalamazoo. Grand Rapids just had a lean startup workshop and GVSU has its own YC style incubator.

Kalamazoo just started a Hackers and Hustlers chapter and they've got another group that meets regularly with people doing pitches.

If you're considering coming to Michigan let me know and I will try to help you.