Came across this the other day Scientific American. Apparently their are a group of Columbia University Engineering students coming up with a way to use Bamboo as part of a bike frame. Their goal is make bikes cheap and affordable for citizens in Africa. If you feel like this a good cause, you can donate money by buying a Bamboo Bike Project cycling jersey.  Here is their website if you want to learn more:

http://www.bamboobike.org/Home.html