"The Semantic Web technology is one key to assuring that peer-to-peer can resolve these issues. The Semantic Web technol-ogy adequately can describe resource information. RDF (Resource Information Framework) is attracting attention for its flexibility. One of the purposes of this study is to explore a ubiquitous peer-to-peer network architecture that will al-low various devices to communicate with one another across various networks."
There's some interesting screenshots of mobile phones running a search using their RDF enabled P2P technology.
A Platform for Peer-to-Peer Communications and its Relation to Semantic Web Applications
Part of the papers presented at the "1st Workshop on Semantics in Peer-to-Peer and Grid Computing"