While I have no experience with any of them, a  quick google search yields a number of DOs in the area.

Yes, there are ample farmers' markets here. Between Duluth and Superior, you can find one about 4 days a week. There are also a number of CSAs serving the area, practically delivering food to you.

I'll second Liebaerts as a great source of meat. They're great people with wonderful practices and a real drive to do it right.

Congrats on the move. Duluth is a great place to live. As for cultural diversity, not much relative to many other cities of its size. We expose ourselves and our children to diversity by staying involved with the UMD and its cultural activities. The universities in town are among only a few 'sources' of diversity in the city.

Give Casey Knutson Carbert at Edmunds Realty a call ... she does a rockstar job on the house-hunting end of things.

My kids see Heather Winesett at St. Lukes Peds. I think she's trained as a traditional M.D., but she treats the whole person and my kids like her + nurses there.

Education is what you make of it. But that's true anywhere.

You are welcome over at the parenting email group that sprouted out of the natural childbirth prenatal yoga class in town. It's called Circles of Duluth and is hosted at Google groups. (It's an open list ... anyone is welcome unless you want to spam the list).

+1 for Green Pastures Dairy. They are genuinely nice people and have great cheese and beef. I miss them at the Farmers' Market every week...

We get our milk delivered from Dahl's Dairy in Babbitt and get meat and eggs bi-weekly from My Little Farm in Moose Lake.  We live healthier lives in bike-friendly Duluth than we did on Long Island.  Racial diversity is more limited here.  The lake isn't the ocean, but it's its own wonderfulness.  Come, life is good here.

Ha. That's funny, I just noticed, the link you posted was one that I put up on Metafilter. So encapsulating about 30% of all my internet time, Metafiler and pdd. Tell you what, if you make it back to these fair shores I'll hand deliver a copy of the cd that the linked song is on. As to the broader questions: yeah there are a few CSAs in the area, including The Food Farm (http://www.foodfarm.us/Site/about_us.html) amongst others, they have weekly egg shares as well as winter/summer/canning/picky eater shares. Whole foods is pretty good. Mt Royal Fine foods has integrated organic selections, so organic selections are right next to standard products which I find nice. Diversity is limited unless you are actively seeking it out, in which case there are enclaves, but like everything else in Duluth you have to work to achieve what yo want ( I just talked to someone who recently went to a gathering where they where the only while folks present). It is not a city to appease the lazy. If you are active and assertive you can have a very fulfilling, life affirming life here. If you expect things to be easy.... well I hear Nashville is a booming town.