Convergence 08

I just learned about Convergence 08, a two-day event at the Computer History Museum in Mountain View, CA featuring a bunch of futurists and other thinkers on technology. From their buzzword-heavy blurb:

On November 15-16, 2008, the world's most dangerous ideas will collide in Mountain View, California. Convergence⁰⁸ examines the world-changing possibilities of Nanotech and the life-changing promises of Biotech. It is the premier forum for debate and exploration of Cogtech ethics, and ground zero of the past and future Infotech revolution. Convergence⁰⁸ is an innovative, lively unconference, the first and only forum dedicated to NBIC (Nano-Bio-Info-Cogno) technologies.

Link: Convergence08.org.

The speaker list includes some heavyweight futurists/technologists like Paul Saffo, Aubrey de Grey and Peter Norvig, and at least one critic, Denise Caruso.

I'm not sure I get the idea of an "unconference" as the main event, though. I thought those were typically free, alternative forums that took place outside big conferences.