"RSSOwl is a free RSS (0.91, 0.92, 1.0, 2.0) newsreader written in Java programming language using SWT as fast graphic library. Features of RSSOwl include reading RSS or RDF newsfeeds in a comfortable tab folder, save newsfeeds in categories, export them to PDF / HTML or OPML, and view news in an internal browser."
Even though it had some issues with freezing, laying out some of the UI, and other bugs it's easy to get running and it's not too bad. It'd be nice to have support for RSS autodiscovery. I think I still prefer NetNewsWire or NewsMonster although I should try the others.