RESOURCES ON HOW P2P FILE-SHARING CLIENTS AND NETWORKS WORK
How popular file-sharing networks like Fast-Track and Gnutella work
Resource describing what file-sharing is
Wikipedia resource on file-sharing
Resource on P2P networking and P2P software

FACTORS AFFECTING P2P FILE-SHARING USE
Article on predicting the usage of P2P applications
An article on file-sharing and the Napster/Grokster case
A survey with statistics on the usage of P2P clients among the general population

FUTURE OF FILE-SHARING
Cashing in on file-sharing
An article discussing whether P2P applications have a future beyond illegal file-sharing