Every serious web platform has tools for payment processing, but this
has been an area that Plone has not yet resolved. With a rapidly
growing body of users who are demanding this functionality, we need to
make it easy to process simple payments through the site out-of-the-box
(ie donations). Additionally, with a fleet of developers ready to make
useful tools, we need a general framework for commerce in Plone that
enables developers to build products for Plone that involve more
sophisticated commerce applications (and not have to reinvent the basic
stuff in the process).
Development Mailing List for the GetPaid Ecommerce Framework
http://www.plonegetpaid.com
http://code.google.com/p/getpaid