We can all use a little more exercise (well, most of us at least), but as long as we're all going to be doing laundry, why not get a good workout at the same time? With the Bike Washing Machine, you can!
Aside from the obvious health benefits, the Bike Washing Machine also helps save electricity -meaning you're not only getting in shape, but also helping the earth. The downside is that the design is still in the concept stage, so you won't be able to get one any time soon, but with something this promising, we can only hope it will be available in a short amount of time.
But you don't have to wait... you can get manual washers right now. Unfortunately it is hand- (not foot-) powered, but available for just $51: http://www.amazon.com/dp/B002C8HR9A/
Even here in the 1st world, they seem like a great idea for laundry needs in an off-grid cabin, trailer camping, maybe even longer-term car camping, or similar.