We're experimenting with another way to do our laundry without a machine, based on this instructable. It involves putting your laundry in a big plastic container, filling it with soap and water, soaking it, and then stomping on it for awhile to get the dirt out. It seems to work really well, though a washboard is better for scrubbing if you've got something really dirty.
We've been doing this outside with water from the hose, and then watering the garden with each rinse cycle. Plus, it's a pretty nice way to cool down on a hot day!
PS. We're having more digital camera difficulties, which is why I've been scant with the pictures lately.