there's a very considered article by Janis Ian (www.janisian.com) at her homepage that neatly canvases the issues associated with p2p, mp3, copyright, and RIAA - Courtney Love has also written some good pieces but I can't remember the links so you might want to kick google into action - another avenue you might want to explore is to use google to take you to the various groups chatting away about the ethics of p2p and mp3 files (absolutely every side of the debate represented)

Cheers, bad_vlad