Per suggestion (I didn't know this thread existed) here are some of the PCB designs I've done in the past. Some are functional electronics, others are, well, "special"
This was the puzzle badge for Defcon 20. The top part was a fully developed dev platform, complete with PS2 keyboard, VGA, mouse and mic.
Did a set of playing cards, fabricated PCBs. All the art was done in the free version of Eagle just to see if I could do it. For those not familiar, it's NOT graphic design software
Close up of some of the playing card PCBs. Wired magazine did a write up of them.
Defcon 22 circuit board badge. Note the double rows of through holes on each side- some of the pads are square, some are round, it was an encoded secret message
More of the Defcon 22 badges
Skull done as copper layer on PCB
That's probably enough for now. After Defcon this year I will continue work on doing a keyboard PCB with art/colors as part of the PCB...it's going to be kind of a pet project...