If you havent gotten involved with newsgroups yet its time you do so. Its a little more trickier than Kazaa or DC++ however far better and far less irritating once you know how it works. Here is a little introduction to the newsgroups and the mechanics behind them...:

http://www.slyck.com/ng.php?page=1

The page also holds guides to other filesharing programmes/tools such as DC, IRQ, Gnutella etc...