Here is an interesting testimonial page with reports of people who are using this type of hand tool for soil prep and other gardening tasks. This is (I believe) a British site, but similar tools can be ordered here for the U.S. market.
Permaculture is the use of skilled design to produce ecologies, economies, and communities which are grounded in an ethical consideration of their environments. This is a group to help those of us interested in Permaculture in Louisville and nearby to meet and exchange skills, knowledge, and news about the sites we are working on, planning, or just dreaming about. Anyone who is interested about sustainable farming, natural building, appropriate technology, and so on is welcome to join.