A lot of hacker conventions offer audio or video of programming weeks or months later, allowing non-attendees (or attendees who missed some tracks) to experience the panels.
Well, The Last HOPE, a hacker convention going on right now in New York City, is broadcasting many of the tracks via the internet as they happen.
If you can’t make it to the convention, this is the next best thing! Go to http://radio.hope.net Friday through Sunday and take a listen.