I’ve had people tell me the GlassFish unconference sounds like for core community members only. If you look at the registration page we indeed have a full house of GlassFish engineers (thanks all for signing up!), but clearly if you use GlassFish or intend to in any way, you should get something out of the discussions there.
The content will be driven by the people that show up and this is not a death-by-powepoint gathering. Sun people are there to listen, share, and discuss, not present. Remember, NO SLIDES (very short demos are acceptable)!
v3, scripting, Rest, ESB, real-life experiences, and migration seem to be the hotest topics so far.