Hi. Conductive printing has been around for a while. Here is a company where I got some free samples probably about two years ago.

http://topflight.com/capabilities/conductive.htm

They sent me some printed circuits done with conductive ink on paper and on a transparent sheet. The only bad thing about this is that you can not solder any component to these circuits, so they can only be used as a PCB antenna, connection strips, etc.

Now, been able to do this at home with an inkjet printer is a nice advantage.

Robert