Are you guys out of your minds? A treadmill desk. Have you even considered the energy-wastage implications of this? Oh no, sorry, I forgot, as libertarians you've probably opted not to believe in climate change.
The solution to this non-problem is obvious. it's called healthy balance. Get an ergonomic chair for working, and take regular breaks. And then walk home from work. Basta. "Problem" solved. Why does there have to be a technological "solution" to everything? This thread is just crazy.