I saw Hagen Graf do a live walkthrough of Drupal, Wordpress and Joomla from scratch back on Monday. Since then, I've turned my rough notes into a more detailed writeup on the Usability group on groups.drupal.org.
I don't think the unconference was recorded, and live demos don't work anyway if all you're recording is sound plus slides (is that rumour true?) so that writeup should help fill the gaps.