I can't believe I missed a Campy mix-and-match discussion -- one of my favorite topics. Speaking of which, let me share the latest revision of my 650B Grand Jublié, now with extra Gugificazione and über-rare Campagnolo x Gevenalle shifters (need a name for that, Gevegnolo?), still with a respaced 10-speed Shimano cassette on an 11-speed 105 rear hub.
I posted a few pics of this in another thread recently, but now it's rideable. In fact, I rode it to work today. I tried yesterday, but the front brake was squealing uncontrollably. For some reason I couldn't get the left brake pad to toe in. So I ran it by the Atelier last night where, after verifying that the cantilever studs were, in fact, straight and properly aligned, gugie de-straightened it for me a bit so that I could get the toe-in going. Today, excellent braking and totally silent.
I really need to take some detail pictures of these shifters, because they're awesome.