This is new to me. I was checking out the nightly builds of Firebird 0.8 betas (windows and linux, mac) and they've got an rss button and panel that parses RSS, with titles linking to the main window. Slick, but they need to let you track which ones have new/old items.
update: It turns out I'm actually a dumbass. I installed this RSS extension so long ago I forgot about it, and because I never saw it show up in any menu, I figured it never "took" on my Firebird install. Then when I had the new nightly build the toolbars were out of whack on first run so I went to customize them and saw the RSS button for the first time, and assumed it came with Firebird 0.8. My bad.