I released a cms a short while ago that works with web pages designed in Xara. Here's an example website I actually just put live for a client yesterday http://www.rosannacrothers.com/ - it's designed and published from Xara into the cms and it has shopping cart functionality and the client can log in and update the content on the pages themselves.

Defining the dynamic content area is easy, just one placeholder with one tag {page_content}