It's two, two great tours in one weekend!
On October 4th, the Minnesota Renewable Energy Society is hosting The Minnesota Solar House Tour in the Greater Metro. On October 3rd and 4th, the Midwest Renewable Energy Association is hosting it's annual 2008 Wisconsin Solar Tour (many of the exhibit homes are quite western). These tours are a tremendous opportunity to talk about solar with the homeowners themselves. I have found these knowledgeable and experienced solar users to be a tremendous resource. If nothing else, they can talk about the process without trying to sell you something. Win.
ETA: By western I mean on the west side of Wisconsin close to the Twin Cities, not in the style of a John Wayne movie. Although that would be pretty bad ass as well.