Hofmockel.org

Many sessions at Drupalcon 08 were video taped and are being uploaded to Archive.org

http://www.archive.org/search.php?query=subject:%22drupalcon%22

Ps. here is a link to the Barcelona presentations - http://www.archive.org/search.php?query=subject:%22drupalconbarcelona200...
or just search on Archive.org for Drupal and you will find more videos/audio/media - http://www.archive.org/search.php?query=drupal