I don't post often, but I've been around a long time.
It took me a minute to think how far back.
I moved to NYC on Sept 1 2001. I remember processing much of the trauma of 09/11 by reading this board because I really didn't have a community here yet. Someone posted comps for an off-broadway show as a way of moving back into the world after 9/11. I can't remember the name of it now, something about "Home". I took advantage of those and it's a core memory for me about starting to heal after 09/11.
By then I had already been here for quite a bit. I vaguely remember being and intern with the Signature Theater in DC and reading ATC. That must have been 2000 or so. Maybe earlier.