Thanks for Trn, it's the best!
I've always considered trn to be The One True Newsreader. It's very old, but still the fastest way there is to blast through newsgroups, by far. You really want 4.0-test76. The 3.6 that you get when you "apt-get install trn" does not understand MIME. Caveats: On modern gcc compilers, you must have patch 1736810, and you must install ncurses-dev if you don't already have a curses package. On a Mac OSX, you also need patch 2818663.