The new version includes three major features, all of which came about in response to requests from users. The new features include the ability to filter out adult products, creation of a breadcrumb trail as the user browses through the catalog, and display of alternate versions of a book. Browse node support has been improved, with a special focus on the DE (German) locale.
MrRat has been a very long-term developer and supporter of AWS and it has been very enjoyable to watch him build his community and refine his product over the past couple of years.
You may also enjoy reading his recent article, The Profit in Altruism.