Rob Boothby aptly describes the recipe for success in a networked world.
Our loosely coupled webs of hypertext, services, and data present an intriguing realm of perpetually expanding and contracting clusters (aka conversations as exemplified by digg swarms). The only issue we have today is that you cannot perceive the aforementioned realm through the lenses of the Hypertext- or Interactive-Web or the API oriented Services-Web. Which is why we need a new frontier in the web innovation continuum. A frontier that unveils, with clarity, the somewhat unperceived realm of "People and Data Networks" en route to simplifying "Network Effects" exploitation: spotting, connecting to, and constructing conversation clusters.
Once again, this is what the Semantic Web facilitates by delivering a Data Model that exposes these "People & Data Networks". When you write a blog post, comment on a blog post, share bookmarks, tag resources, share and tag photos etc. You are contributing links and nodes to this network :-)