My GlassFish v3 presentation from last week’s JavaZone is already posted along with many others. If you’re interested in the demos, feel free to skip right to them:
Demo #1 (developer features) @ 7:01
Demo #2 (Java EE 6) @ 21:00
Demo #3 (GlassFish à la carte) @ 26:00
Demo #4 (OSGi) @ 36:50
Demo #5 (RESTful admin) @ 49:00
There’s also an offline version (close to 200MB of MPEG-4 for QuickTime in 640×480 format).