Don't expect strings or even the need to tune, when you've got the Linux-powered Misa Digital Guitar. This instrument "has 24 frets and a large multifunctional touchscreen, which you can use to interface with the appropriate software on your pc." Video after the break.
The intersection of the classical instrument known as a guitar and the modernist urge to modify everything has resulted in plenty of nutty, zany, and just plain questionable products in its time.[via Engadget]