Here is the python port: http://rene.f0o.com/~rene/stuff/shadertoy.py
Maybe it'll be useful for someone learning shading languages through python. Or not.
It's a fun demo anyway. Press the 'Anykey' to change between shader. You'll find the 'Anykey' on your keyboard. If the Anykey you press is Escape, then the program will 'quit'.
Requires 1 tsp of pygame, and a cup of pyopengl.