That is definitely a good, interesting beer.
I just took the Boulevard tour last weekend. Had a knowledgeable homebrewer for a tour guide, and I asked a lot of questions, unfortunately none were about the Nutcracker specifically.
I did find out that they use the same yeast for all their ales, so you might be able to cultivate the same yeast strain from a bottle of their unfiltered wheat. I was thinking about trying that myself, although I wouldn't be surprised if it were a pretty generic strain. They do bottle condition all their beers with a different strain than they ferment with, so I don't know if the unfiltered wheat would be tainted with another yeast strain or not.....They also do single step infusions for (almost) all of their mashes.
Their website doesn't list any spices they might use, but does list the
grain and hop bill.
Good luck, and if you come up with something close be sure to post it!