RE: Minnesota ice cream
For a state with a large dairy industry, MN doesn't seem to do much with ice cream. Maybe it's just too cold most of the year to want something cold in your craw. Anyhow, the ones I recall being notable were Grand Old Creamery and Sebastian Joes.
The big grocery store brand there is Kemps, which seldom gets mentioned in the "best regional" etc. threads. It's just too darn sugary.
Also, I believe the Dairy Queen HQ is in Mpls, so that might be worth a mention.