A set of podcasts from Reboot7 are available here.  While you can't see the slides or the presenters, you can hear complete presentations and discussions.  For those interested in a terrific presentation on how Social Tagging is being used in real projects don't miss Lee Bryant's talk.

The following recordings are:
Anders Bertram Eibye, Ben Cerveny, Dina Mehta, Doc Searls, Dragos Novac INCOMPLETE, Felix Petersen and Stefan Kellner INCOMPLETE, Harald Welte, Jason Fried, Jimbo Wales, Jyri Engstrom, Lee Bryant, Matthias MullerProve, Michael Heilemann, Paula Le Dieu, QA with Doc Searls and Robert Scoble, Thomas Harttung, UllaMaaria Mutanen.  

Podcast of my presentation and discussions on Social Tools in Research & Collaboration - 64 kbps mp3 and 128 kbps mp3.

I also discovered some screencasts on Reboot 7 presentations.  They aren't perfect ... maybe it's my bandwidth that slows down the streaming ... but they do give you a good sense of the speaker and the presentation.