Okay, I am admittedly on the fence about bamboo. On the one hand it is rapidly renewable, on the other, it is primarily harvested in Asia for building materials and products like this bike which means the embodied energy (including the transportation to get it here to Washington, DC) is a tad carbon-heavy.
That being said, this is a cool bike. According to the manufacturer "It is appropriate for everyday use and for racing. The vibration damping is a performance advantage on longer rides...
"If there were an award for "Bicycle with lowest carbon footprint" (least amount of carbon dioxide emissions in the production of the frame), this frame would win, hands down."
Now why aren't there awards for bicycles with the lowest carbon footprint? I would love to see some additional nominations!
P.S. I found these pix here: http://www.calfeedesign.com/bamboo.htm