One favorite was...
CUE Session: Seven-Steps to Flatten Your Classroom
Session Description: The session presenter was Vicki Davis who won the ISTE online learning award for her Flat Classroom Project. Atomic Learning sponsored her presentation and posted her eBook for free here.
Vicki Davis got into the practical applications, rules, and protocols you need to consider as you use web 2.0 tools for learning. A fresh perspective from one that uses the tools widely in her teaching.