What are the Google IO must watch sessions?

This talk on an intro to WebGL and how to optomize it is awesome: http://www.youtube.com/watch?v=rfQ8rKGTVlg

Also I found this talk on developing an HTML5 game interesting: http://www.youtube.com/watch?v=yEocRtn_j9s&feature=relmf...

Mostly because its eerily similar to a simple game I made years ago in flash:

http://www.travisglines.com/resume/planetdefender/PlanetDefe...