Even if the Internet looks like a set of decentralized interconnected nodes, IP and DNS make today's internet centralized.?

In this paper (http://freenetproject.org/freenet.pdf), the author -Ian Clarke - discusses an algorithm wich if executed by a group of interconnected nodes will provide a robust key-indexed information storage and retrieval system with no element of central control or administration.

Freenet is a large-scale peer-to-peer network which pools the power of member computers around the world to create a massive virtual information store open to anyone to freely publish or view information of all kinds.

See also www.openp2p.com