Seth Godin is the author of the book "Tribes" - this is the first time I've actually watched him speak in person about the ideas surrounding his posit - I think it's brilliant and branches/extends from the concept(s) of crowd sourcing and wise crowds.
Three fundamental questions at the foundation of tribe establishment/creation/realization; Who are you upsetting? Who are you connecting? Who are you leading? - really insightful and personifies the value proposition of hyper-connectivity.
Mashable accurately describes this presentation by saying, Seth Godin "believes that our revolutionary new connectedness has brought human culture back to its roots, and that tribes (groups of people mobilized around a shared interest) are the present and future of all web content"