Web 2.0

John Robb:

What is Web 2.0? It is a system that breaks with the old model of centralized Web sites and moves the power of the Web/Internet to the desktop. It includes three structural elements: 1) a source of content, data, or functionality (a website, a Web service, a desktop PC peer), 2) an open system of transport (RSS, XML-RPC, SOAP, P2P, and too an extent IM), and 3) a rich client (desktop software). Basically, a PBN puts the power of the Internet in the hands of the desktop PC user where it belongs.