Jon "maddog" Hall is leading off the VON conference, moderating a panel entitled "Free and Open Source VoIP: World Communication Through World."
Jon is one of the people who has made Unix possible... he looks a little like Santa Claus, which somehow seems appropriate given all of the gifts he has given to computing over the years. Here is Jon's bio from the show guide...
Jon "maddog" Hall is the Executive Director of Linux International (www.li.org), a non-profit association of computer vendors who wish to support and promote the Linux Operating System. During his career which spans over thirty years, Mr. Hall has been a programmer, systems designer, systems administrator, product manager, technical marketing manager, college educator and author. He has worked for such companies as Western Electric Corporation, Aetna Life and Casualty, Bell Laboratories, Digital Equipment Corporation, VA Linux Systems, and is currently funded by SGI. Mr. Hall serves on the boards of several companies, and several non-profit organizations, including the USENIX Association.