Slashdot has discussion on an OpenP2P.com story on file-trading service Gnutella's relationship to the Web. "What do Gnutella and the Web have to do with each other? Isn't Gnutella just one of many P2P file-sharing
Yes, Gnutella enables P2P file sharing, but take a closer look. With Gnutella, file transfer is accomplished via HTTP, the same protocol Web
browsers and servers use to transfer Web pages and other data. Under the hood, each Gnutella application contains a no-frills Web-server
component for serving files and a primitive browser-like element for retrieving them."