You can safely file this under the “things that dominate small corners of my brain” department.
Rock Band + Flip Mino HD + poster putty = this:
The focal point is in a bad place, and the buttons on this thing are too loud. All I did was take the Mino and slap it on the headstock of the fake guitar with some putty. If I wanted to take this all the way, I’d design some kind of a mount for it to elevate the camera and get some angle on the buttons, and then a counter-weight for the body of the guitar (it added a not-insignificant amount of weight to the headstock).