Buy, Play, Trade, Repeat - New York Times

Buy, Play, Trade, Repeat - New York Times: "It's much better to have copies of albums on lots of iPods, even if only half of them have been paid for, than to have a few CD's sitting on a shelf and not being played."

Hopefully the text of this article doesn't quickly end up behond the NYT paywall, but read it while you can. This is a very good detailing of the issues involved for all parties.