I have been using NetNewsWire Light on Mac OS X as my RSS reader of choice (FYI I use RSS Bandit on Windows at work).
Ranchero just released NetNewWire 2.0b3, and here's what's new.
The Lite version hasn't received the mammoth overhaul the full version has, here are some notable features:
- Atom Feed Support
- Speed and UI Responsiveness Improvements
- Simplified UI
- Much improved application icon
I am seriously thinking of getting the full version, but with Safari RSS coming out in 8 months or so, I just don't know.