JWR,
I thought this might appeal to the “low-tech” electricity free oriented people. Two designers got a $19,500 grant to bring the “GiraDora” into the real world. Designed from seeing the plight of those living in slums in Lima, they wanted to reduce the work load of poverty stricken people earning $4 to $10 a day.
They created this. It uses less water than washing by hand!
There is some more info here.
Respectfully, – Erik K.