Brent has released the first NetNewsWire Pro Beta. I have been ing the alphas and it's just awesome. Even the first alpha some weeks ago was great and Brent just keeps improving it. Lots of spiffy features. A find command. AppleScript support. A notepad to, er, make notes about things you want to post and an Weblog editor supporting lots of weblog systems. Several I didn't even know about!
Train commuters will enjoy that the Pro version stores headlines between runs, so you can refresh before heading out and read news on the train.