Yasu sent us this link about Bike Furniture. It's got bike parts collected since 1990 that got turned into chairs, mirrors, coat hangers, that kind of stuff. If you think they've only got a few products to offer, you should visit the site and be surprised.
Some of it is a bit loopy but some of it is pretty cool. It's hard to judge how comfy the chairs are from looking at the photos but if you're into this, that doesn't really matter.