I was there, too, and want to echo these thoughts as well. It was my first GTD seminar, and what a priviledge to have my first one by taught by David Allen himself. David has a "relaxed energy" style to his presentation that made 8 hours seem like about 8 minutes! I could have happily spent a whole week focused in a seminar like this, what with the great information, inspired attendees, and beautiful setting.

The material presented near the end, going over people's obstacles to either getting started or sticking with GTD, was especially golden. This is going to be very helpful to me as I continue my effort to be the pied piper of GTD within my team and my department.