Leave A Legacy is a small (1x1 inch) plaque that has a picture or wording on it. They are placed on large polished granite monuments which now stand in the entrance to Epcot, just in front of Spaceship Earth. It costs $35 for one face or $35 for two faces. (The down side is that you can only have two people at the most on each plaque.) They take your picture and it is etched onto the metal. We saw them when we were there, but there are 3 of us, so we opted out.
Have a great trip!