I would advice this short book for all those interested in a copyright debate.

http://mises.org/document/3582

Although the book is called "Against IP", the first part gives a very thorough and fair overview
of both sides. The arguments there are much deeper than the usual "artists will starve
and we will have no music".

Also, I've written a little bit on the matter, plus I have a nice link collection:
http://www.louigiverona.ru/?page=projects&s=writings&t=philosophy



Louigi.