Here's two quotes from
http://www.internetwk.com/breakingNews/showArticle.jhtml?articleID=8600190" Content Management System and Portal Server Version 5 grows out of Red Hat's acquisition 15 months ago of Ars Digita, a Westford, Mass.-based provider of Java-based content management. The news comes out of the AIIM 2003 conference here."
"The new edition lets content authors configure a Web interface viewable in any standard browser, create workflows and syndicate their content via RSS integration, the company said. RSS, or Rich Site Summary, is an XML format for syndicating Web content that then can be broadcast to subscribers. It supports role-based permissions and integrates with standard LDAP directories and authentication"
How does this affect OACS CMS? Would I be right in presuming that this will be proprietary? The prices look steep enough!