I have been doing marquetry and inlay work for many years. I haven't yet done much on any of my guitars to date, but I plan to add more as I proceed. How about a guitar with a bridge on each side? That is, a marquetry picture of the Golden Gate Bridge on the back, and the normal guitar bridge on the front?! If you have an idea for an "art" guitar that you'd like, give me a call.
Here are a few rosette inlay ideas and logo ideas I've been playing with: