Flickr set showing off Leah Buechley’s (of Lilypad fame) paper computing. Includes videos! Plus, a post in the Hi-Lo tech wiki, showing off making circuits with conductive paint
Ciat Lonbarde‘s paper circuits.
Paper Circuitry at Home: Electric Origami shows how to make a paper box-light inspired by MAKE’s LED throwies. Uses aluminum foil for the traces, and shows a nice technique using laser print toner to fuse the foil to the paper.