^ I was in the city since 6pm Thursday evening. Sold some DVDs, ate at Chipotle, watched The Dark Knight Rises at 9pm, walked around a bit (a total of 40+ blocks), arrived at Rockefeller Plaza at around 1:30am, read the first 100 pages of A Storm of Swords while waiting, moved into the plaza before 6am, stood there until a quarter after 9. Both performances I believe happened at 8-8:30 and then around 9am. The first rehearsal was between 6am and 7am.
EDIT: Also forgot to mention I believe there were two lines, 1 for those who had fan passes/VIP passes, and another for everyone else waiting outside. I was lucky to get there before the line got too long or I would have been way back in the crowd.