A bamboo uke is not going to be "solid wood" because the bamboo has to be laminated or joined in strips to make a sheet wide enough for a uke top or back, etc. That said, "laminated" shouldn't be a cuss word - theoretically, proper use of laminated materials could render a better sounding instrument than can be obtained with solid woods. It's just that usually "laminated" is codespeak for "cheaper materials and cheaper construction." That doesn't necessarily hold true when one is talking about non-traditional materials (anybody care for a $6k carbon fiber mandolin, you can buy one if you want to wait about four years for your name to come up on the list!)
John