Stageplay of The Ninth Configuration
The Ninth Configuration, aka Twinkle, Twinkle, Killer Kane has been adapted for the stage:
http://www.vcstar.com/news/2010/jan/22/minds-pushed-to-the-edge-a- raucous-assemblage-of/
I remember reading or hearing rumors of a stage adaptation, but this is the first I've heard of it being realized.