I'm working with Furfly to finish a port of the ACS 3x version of ecommerce to an ACS 4x package. We are almost ready to release an alpha version to the community.
See this thread at web/db forum for details:
http://www.arsdigita.com/bboard/q-and-a-fetch-msg?msg%5fid=000b5M&topic%5fid=web%2fdb&topic=
