Ye' old general discussion board. Basically, for everything that isn't covered elsewhere. Come here to shoot the breeze, shoot your mouth off, or whatever suits your fancy. This forum is not for asking programming related questions.
I think the key is that the enjoyment of a Rube Goldberg machine is seeing how the machine changes as execution passes on. Thus, we're not looking at the most convoluted code, per se, but the most convoluted execution--while still being decipherable by humans.
This might be fun, although to be fully enjoyed I imagine you'd need a debugger.