DrunkenBatman interviewed the developer's of the Four news aggregators for Mac (RSS for Mac OS X Roundtable) back in October 2004 before Tiger was released. Among the topics of conversation: Safari RSS. To which PulpFictions's Erik J. Barzeski responds: "Many aggregators are available in "Lite" versions, and Safari RSS lacks many of the features found in those freeware aggregators. It offers in-browser support for RSS feeds, but us smaller developers have a large lead."
Here, here brother. Safari RSS is a neat idea, but poorly implemented with very little in the way of features.