The videos by Nik Peachey and George Siemens will not play in a Slidecast, so if you would like to view them you will need to go here:
Web 1.0 http://db.tt/U6kEP7L
Web 2.0 http://db.tt/nZfnlZz
Sorry for any inconvenience. Greg Q.
The link to the full conference paper is here.