John Buckman of Magnatune, Gene Hoffman founder of eMusic, Edward Klaris of New Yorker, Adam Toll of Big Champagne, Sam Yagan of MetaMachine (eDonkey), Tor Hansen of Yep Roc, Roger McGuinn and hosted by Koleman Strumpf, economist.
Quite a variety of voices here as you might guess from the affiliations.
In the audience, Cory Doctorow, Robert Kaye, Chris DiBona, Scott Adams, David Bollier, Marybeth Peters, Roy Kaufman, Chris Evans, Laurie Racine, Jocelyn Neal, Stephanie McGarrah (see this page for ids).