The Wall of Pucks. If my math is right, there are 1,456 pucks on the wall. I'm pointing to the lone (that we could see) Vancouver Canuck puck:

The gloves, helmut, stick and puck used by Wayne Gretzky to score his 802nd goal (against the Canucks, no less :P). That's also the net he scored it in. The owner or commissioner of the HHOF was at that game and had put a piece of tape on the net with his signature on it, so that when he got it back he would know that it was the same net. He received a letter (also on display) stating that it is, indeed, the same net... the tape is still intact.

They have an exact replica of the Montreal Canadiens dressing room that was in the Montreal Forum. On the right, where the guy in the blue shirt is, is where their exercise room is, also an exact replica, right down to the old-style hot tub (didn't upload pictures of that room).

The original Stanley Cup. It's in a room that I think was a bank vault at one time.

The bottom part of the Cup:

And the flattened panels from the Cup, dating from 1927 to I think 1955 (or 1959):

Mike next to the current Stanley Cup:

And me next to it! It's almost as big as I am!