Incident has introduced the gTar – an iPhone guitar:
Incident began out of a personal need for a guitar that could plug into the computer to compose music digitally. When the first functional prototypes started coming together, we were inspired by innovative musical instruments like the Monome and decided to try adding LEDs to the fretboard. We started to see how fun and easy it was for someone with no musical background to interact with the bright, colorful lights and we knew we had something worth pursuing.
See the kickstarter site for details.