I was over in Pleasanton 2 weeks ago dropping off my Mom so I decided to visit a new tandem shop. Their name is Crank 2. They are right off the 680 at Sunol Boulevard.
This shop is loaded with tandems! I have been to many bike shops that say they "specialize" in tandems=we have 1-2 tandems on the floor. This whole shop is tandems. they must have at least 40 on display. here are a couple of photos I took with my phone. It looks like they carry Comotion, DaVinci, Santana and KHS. They also seemed to have very good selection of clothing, especially for Women.
I also talked at length with Bryon Price, I think he is the owner. I sounds like his whole family is working the shop and that they love tandems. I am excited that there is a place in California that my wife and I can go to and try more than 1 tandem. If you like tandems this shop is a definite 'must see' if you are in the Bay Area.
Look them up on the web www.crank-2.com