The sessions I attended today were rather amazing.
Annotation Hammer w/ Venkat Subramaniam
The first session I attended was venkat talking about using annotations in java. I've used annotations all over the place, but I never really knew how to use then internally or why you would want to use them. It really cleared up a lot of the clouds floating around annotations. I found this session quite helpful.
Yahoo UI! Library w/ Scott Davis
The next session I attended was Scott Davis talking about the Yahoo UI libraries.
Google Web Toolkit parts 1 and 2 w/ David Gaery
BOF Discussion w/ Scott David and Venkat Subramaniam
more to come..