Firestone Walker Union Jack
Russian River Pliny the Elder (is Younger in bottles/in season?)
Sierra Nevada: Estate Ale, Bigfoot (Don't think I've seen these in WI)
21amendment: Watermelon Wheat, Brew Free (need to try an IPA in a can)
Can get anything from Wisconsin,
..and pretty much anything else from the state.
Matt, You can get both of the SN beers in WI for sure. Bigfoot is seasonal and should be around in a couple months. Where do you live in Wisco?
As far as the others, yes 21A beers are in MN and Elder is bottled but always look for a fresh batch. Younger isn't bottled, it's a tap only product but worth a trip out to the SF area for it. Union Jack is great as well as DBA from FW.