Some of the sessions from Google scalability conference are now available on Google Video.

YouTube Scalability
http://video.google.com/videoplay?docid=-6304964351441328559

Building a Scalable Resource Management
http://video.google.com/videoplay?docid=-3937025764791991714

Abstractions for Handling Large Datasets
http://video.google.com/videoplay?docid=-2727172597104463277

Lessons In Building Scalable Systems
http://video.google.com/videoplay?docid=6202268628085731280

MapReduce Used on Large Data Sets
http://video.google.com/videoplay?docid=741403180270990805

Scaling Google for Every User
http://video.google.com/videoplay?docid=-7039469220993285507

SCTPs Reliability and Fault Tolerance
http://video.google.com/videoplay?docid=210885113635893162