Printable circuit fans: IEEE Spectrum reports on progress--non volatile RAM printed on paper!
The report by Rachel Courtland has pointers to details and some background information.
Really cool!
A project started (in part) by a Fab Lab patron and UIUC Material Sciences researcher, Analisa Russo, Circuit Scribe is an easy way to get into learning circuits on paper and get around breadboard learning techniques. Learn more (and donate, if you like) here:
I believe a few of us are going to pick a version up for the main lab and TUFL to test and play with. More on the project at http://www.kickstarter.com/projects/electroninks/circuit-scribe-draw-circuits-instantly