Did anyone see this article in Mother Earth News in July? There is a small write in regarding it this month and the guy says he has been using the same bags for 7 years. Just hand tills and fertilizes and adds peat moss every year. Sounds interesting, I may try it next year.
http://www.motherearthnews.com/Organic-Gardening/2008-06-01/No-Dig-Garden-Beds.aspx
http://www.motherearthnews.com/Organic-Gardening/2008-06-01/No-Dig-Garden-Beds.aspx