Live Bookmarks and RSS News Feeds

Check it out. I just read about "Live Bookmarks" being available in Firefox.
Basically, you add a "Live Bookmark". This creates a folder with bookmarks
that are populated based on the RSS newsfeed. For instance, I created a
Live Bookmark to Yahoo News. Under my Yahoo News bookmark folder are URL's
leading to Yahoo News stories. The bookmarks update themselves as the RSS Feed
is updated. This is way cool :)