In the end peer-to-peer has nothing to do with copyright. It's the way the Earth links.
For linking people and ideas, P2P is simply a better topology than client-server. It conforms to the way people are. Capitalism is a peer-to-peer economic system. Socialism is client-server. Democracy is a peer-to-peer political system. Autocracy is client-server.
The difference is just that stark.
The myth of the "Intellectual Property cult" is that the products of intellect are unique, complete, all-in-all. They are not. "If I have seen further it is by standing on ye shoulders of Giants." That's Sir Isaac Newton.
This applies to all products of the intellect:
All this is a long-winded introduction to a new product of Earthlink research.
Earthlink calls it SIPshare . SIPshare demonstrates that the heart of Voice Over IP is that it's a peer-to-peer system. SIPshare uses the Session Initiated Protocol on which VOIP is built to create a true file-sharing system.
In the end it's no great leap. Earthlink is re-creating the business "grapevine," that invisible network that lets rumors become transmitted as facts before they're even announced. It's a natural, normal human process.
Try to ban the grapevine and you make humanity itself a copyright violation.