Polish food in the Ann Arbor/Ypsilanti area?
For shopping - Copernicus European Delicatessen
617 South Main Street, Ann Arbor, MI 48104
For Restaurant - http://www.amadeusrestaurant.com/
For what everyone else will be telling you soon in the future. If your Polish in Michigan you need to get to Hamtramck and get to the Polish Village Cafe. Also while in town hit up Bozek's Market.
Polish Village Cafe
2990 Yemans St, Hamtramck, MI 48212