http://sites.google.com/site/io/google-io-sessions
Random selection....
Kevin & me: (still with facial hair for May Mustache competition)
http://sites.google.com/site/io/urls-are-people-too---using-the-social-graph-api-to-build-a-social-web
Joseph Smarr's talk is great:
http://sites.google.com/site/io/opensocial-openid-and-oauth-oh-my
Behind the scenes at Google: (Jeff Dean)
http://sites.google.com/site/io/underneath-the-covers-at-google-current-systems-and-future-directions