My wife and I have been doing crude sketch ideas recently, and came up with something that we will personally try to put in. We will attempt something closer to a geek chic table with removable top and recessed gaming area, but my wife enjoys jigsaw puzzles so we will incorporate a thick flat board (maybe 3x5 or so) with a thin molding all the way around the edges(so pieces won't fall off) that will slide into holders right under the table below the recessed area. That way she can take as long as she wants without taking up other room in the house.