According to the offical web 2.0 summit site :
Only the Web 2.0 Summit brings the intelligence, innovation, and leadership of the Internet industry together in one place at one time. Through incisive plenary sessions, cut-through-the-hype onstage conversations, rapid-fire "high order bits" and "show me" presentations,
visionaries and executives across key industries will present their unique perspective on the Web's future-in-flux and how the tools and principles of Web 2.0 are impacting their businesses. You'll learn what business models are working, what's next on the horizon, and how all of this will affect your own business. We've built in plenty of time for catching up with old friends and making new acquaintances, and for connecting with the leaders and technologists redefining the Web's business opportunities. Web 2.0 Summit is brought to you in partnership with O'Reilly Media, Inc. and TechWeb and moderated by John Battelle, Program Chair, and O'Reilly CEO and founder, Tim O'Reilly.
Attendance at Web 2.0 Summit is limited to maintain an intimate setting and foster dialogue among all participants. Registration is by invitation only.