In case you missed this item on printing printed circuit boards, see:
http://www.engadget.com/entry/6214434887711755/Epson prints 1mm thick circuit boards on an inkjet
Really brings new meaning to the term "printed circuit board" when
Epson goes and creates a process by which an inkjet printer can
literally spit out complicated boards. Circuit paths are drawn by
conductive ink and layered between coats of insulator ink. Naturally
you shouldn't expect to be able to download and shoot out the latest
nVidia or ATI board every 1.3 days they release a new one, but this
could mean really, really big things for portable electronics and
wearable computing since these boards are only 1mm thick at 20 layers
(trust us, that's pretty amazing).
Curt, W4QBU