I was just doing some old-fashioned web surfing the other day and came across some really interesting concept bikes from Specialized. On top of that, these bad boys were tandem bikes! The first one I ran across is the Specialized SHIV tandem and it could easily be hung on a wall as art. Complete with integrated brakes, computer and the pretty awesome shaft drive for the front rider (notice the lack of chain from the front), this bike breaks the rules of design and with the right riders would likely break some pretty intense speed records as well.  Here come the pictures (from the one and only Conrad Stoltz):