Check it out. This might be a fun project and a good way to make a custom frame:
Bent Plywood Bicycle
Bent Plywood Bicycle
I have to agree there. It wouldn't have been that difficult to make a block out of stacked plywood that the crank tube went through then bolt/glue that to the frame.I really like that idea! The pedal crank mounting looks dodgy though.
I'm not sure I'd want to motorize one of these. I'm afraid it might put the "BAM" in bamboo.Here's a couple bamboo bike frames:
Bamboo Bike Frame.
How to build a Bamboo Bicycle or bike
http://www.bamboobike.org.