I see where Firefox is going to include RSS feed integration into its next version (V1.0) – and in fact has already built it into its nightly branch builds.
Firefox has built the RSS feeds into the Bookmarks – calling them Live Bookmarks or Livemarks. Livemarks allow you to bookmark an RSS feed and these appear as bookmark folders, with individual items in the feed appearing as bookmarks. Check out Redemption’s weblog to see a couple of screenshots of this functionality in action.
Seems Thunderbird is building RSS reading capabilities into the next build (0.8) as well.
At this rate Apple’s Safari RSS, which is scheduled for release with their new Tiger OS in 2005, will be the last non-Microsoft browser with an RSS reader built-in!