Official stuff?
Well, I used some old Ral Partha minis, but not ones specifically designed for D&D.
No official D&D plastic minis, no official maps, no official character sheets ... not even an official setting. As for GM screens, I tend to make my own or just put up a random barrier between the adventure and the players.
So, I didn't use anything "official" for my games that way.
I'm probably way outside the norm that way...