We just saw this on Kickstarter. It's a project that allows you to simply draw your circuits using only a pen and the some kind of conductive silver ink.

There are also a number of other elements that can be used with it such as LEDS and switches.  If they get the backing it sounds like they'll also be creating resistor ones aswell.

This could revolutionise the way we go about wiring harnesses.  Imagine being able to simply lay down your wiring diagram on a piece of vinyl and attach it to your bike, or even better simply draw it straight onto the frame.  Or being pulled over by the fuzz for not having adequate indicator lighting and simply whipping out your Circuit Scribe "What missing indicators officer?"

I like where this is heading, check out the video below and the kickstarter project here