I think that protection of intellectual property on the internet is something that will eventually evolve. I don't beleive it will be merely an extention of the existing copyright system.
I am certainly against someone profiting from an artist's creative work without the artists approval. I do think, however, that when information is freely exchanged everyone benefits. I think if Warner and Sony and the rest did an objective analysis they would agree.
We shouldn't veiw the internet as just a marketplace, it is also a library.