Brent Simmons (of NewsGator fame) has released NetNewsWire Lite 4.0, a great little news reader (RSS, Atom, etc) via the Mac App Store. I got to play with NNW a bit before it was released- it's pretty rad and you should grab it. What could it hurt? It's free! And it's pretty!
Brent also took pics of NNW Lite while it was in development, and has those up along with commentary on his Flickr account: Making of NetNewsWire Lite 4.0. Double rad. I love progress pics.