There is no native OS X news-reader I like to work with.
NNTP is still the best place to find specific information.
NNTP is the only place where you can ask a question.
Information is high good - giving it to other people makes the world richer.
Native Cocoa Newsreader.
Multi-Windowed - see a screenshot here.
Mime 1.0 compliant.
Easy to use.
Still wanted but not ready:
Import/Export to mbox.
QuickLook plugin for multimedia messages.