Just read in In Search of Dessert's blog about a trip to Solothurn and The Old Arsenal Museum, which apparently has the largest collection of arms and armor in Europe. Sounds like something MrB would really enjoy, so I'm making note of it here for later. I can just see myself a few months from now thinking "I know there was this really neat place I wanted us to visit, but where was it?!"
It is closed Monday, New Years Day, Easter, Pentecost Monday, and Christmas. She also mentioned that there are some beautiful old cathedrals that would be interesting to visit, and a great little quirky kitchen store: Kerzenjeger at Hauptgasse 38. She has also blogged about the walking path along Lake Neuchatel which sounds like a great thing to do for a weekend trip.