I forgot where I saw this, but it looks worthy of a try. I’m too busy right now to test it though. Sorry.
“[A] tool which combines an RSS/ATOM feed reader, a newsgroup reader and a Web bookmark manager in a single easy to use interface. Omea Reader includes the full range of information management features of Omea Pro, including fast searching, views and categories, flags, annotations and much more. Omea Reader can be extended with new features or even new resource types through its powerful plugin development Open API.”