anniebakerfan said: "Has anyone tried the full-price cancellation line for this? (Or heard of anyone getting a ticket this way?)"
As a matter of fact, I did it yesterday. Here's a full report:
I got to the theatre at about 12:30pm, and there were already 3 people in front of me (one of whom was getting 2 tickets, so I was ticket #5). The first person got there around 9:30 or something. The 2nd person got there at like 10:45 I think (I can't remember exactly, but something in that range). The box office opened at 2pm, and by then there were roughly 8-10 people in line. Luckily, there were already 2 tickets available via cancellation, so the first person in line got tickets right away, while the rest of us got put on the list. They tell you to come back at a half hour to curtain. When you do, they give you a buzzer with a number, (like you'd see at a fast food restaurant), and you can wait anywhere in the lobby. If a ticket becomes available for you, the buzzer will go off and you go up to the box office to purchase it. My buzzer went off at about 5 minutes to curtain, and I know the 2 people behind me were also able to get in. So there were at least 7 cancellations yesterday total.