My housemates and I have one coming in the mail.

My idea was to make a window compositor for X--the idea being that all open windows would be scattered around the inside of a sphere or hemisphere or perhaps hypercone with the user's head at the center.

You look at a window and slowly turn to face directly forward, and the window blows up and moves into focus. A shake of the head dismisses the window, and a sharp snap to either side cycles through open windows.

Shoot me an email if you'd like to talk more.

EDIT: X programming is fucking arcane. :(