I know there’s a video of my keynote floating around somewhere, but I decided to record audio and sync it with the slides, then publish it on Slideshare. You can view or download the presentation, or play it synchronized with the audio track directly online:
Impact of Social Technologies on the Enterprise
View another webinar from Sandy Kemsley
My recording setup is far from professional, so the sound quality may not be the best, but it should give you a flavor of the live presentation.