Free news reader application for your Mac OS X
Version:TRN is Threaded Read News, a text-mode newsreader based on Larry Wall's "rn" with a bunch of improvements, including some scaning and scoring features.
Operating System: Mac OS X
Trn also has a visual representation of the current thread in the upper right corner of the header. This will give you a feel for how the discussion is going and how the current article is related to the last one you read.