3C = Content, Commerce, Community | 4th C = Context | P = Personalization | VS = Vertical Search
This, I submit, is the formula for the future: Web 3.0 = (4C + P + VS).
Sramana Mitra charts a potential web evolution at the Read/Write Web
Given that few predicted how Web 2.0 would come to be defined during the early stages of Web 1.0, the concept of Web 3.0 is still a bit fuzzy, and Web 4.0, the WebOS on Nova’s map, is really hazy. The WebOS implies that machine intelligence has reached a point that the Internet becomes the planetary computer, a massive web of highly intelligent interactions.