My two feature posts on Web 3.0 was just linked to at ReadWriteWeb.
Josh Catone writes:
Blogger Jonas Bolinder has painstakingly assembled a list of some of the most talked about definitions of Web 3.0 over the past three years. He's broken them down into 4 basic definition groups: the Semantic Web (which is what might enable the "decentralized me"), the proliferation of APIs and web services (aren't we already living that?), the rise of the mobile web, smart devices, and web applications (maybe the just launched Live Mesh has something to do with Web 3.0?), and the "implicit web."