I got great piazza seats a few weeks ago in the 100s section for $50.50 for a Thursday night show. I waited in line for no more than 20 minutes (instead of like an hour in the Times sq. line)
As far as non-orch seating...I'm not sure, but the seats I got were very good. I didn't feel as if I missed anything in Piazza by being on the far left...and usually you're in like 4th or 5th row...very very close.
The key to the mystery of a great artist is that for reasons unknown, he will give away his energies and his life just to make sure that one note follows another... and leaves us with the feeling that something is right in the world.
~Leonard Bernstein~