I won a free sample of Soap Nuts from NaturOli and Passionate Homemaking, so I thought I'd let you know how they worked.
They smelled kind of funny in the bag, but they worked really well. I even washed cloth diapers with them, and they came out smelling fresh and clean. I lost count of how many times I've washed with them, but it's been around five loads and they are still usable.
I checked the website and they are only slightly more expensive than my regular detergent (about one cent per load) but I can't find information about their shipping costs. I may call and ask them, and if the shipping is reasonable I may buy some.
I want to use the most environmentally friendly products I can without being budget unfriendly, so Soap Nuts may be the solution for my laundry.