It seems like eons ago that I saw a bamboo Calfee tandem at last year's Sea Otter but it was exactly a year ago given that Sea Otter is happening again this weekend. I was reminded of it, however, by this all wooden bike made by a carpenter in China. How did he make the chain? He didn't. He used a four bar linkage.
If you'll be at Sea Otter this year, post a comment, there's stickers in it for you!!!
Photo swiped from http://www.chine-informations.com/actualite/chine-il-realise-un-vrai-velo-tout-en-bois_12638.html&prev=hp