In this paper we comment on the relationship between multi-agent systems and peer-to-peer systems. We point out that work
in the frontiers of these two areas can be beneficial to both P2P computing and multi-agent systems, and survey recent research
that is already addressing these issues. Then we summarize the work of our group at the Technical University of Crete on the
topic of selective information dissemination using P2P networks of middle-agents.