The Bike Friday Tandem Two'sDay stood up well to the rigours of cycling in the East African nation of Tanzania. A report on the trip is on the way, but until then, you can check out this video of the tandem in action.
I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft... As for me, give me a fixed gear!