NewsFire is a Mac OS X RSS reader for obsessively-up-to-the-minute types. It has a very slick interface and, despite having animated sorted lists, keeps frills down to an absolute minimum (which I like) and has a good keyboard interface (which I really like). It doesn’t fit my reading pattern (I’d rather use Google Reader), but is easily one of the best Mac OS X native RSS readers:

Update: NewsFire became free on March 1st 2008