There was a video out there of someone doing exactly that. The shelves will support the weight of a layout just fine, plus you get the built-in storage.
Another option, though less attractive, is the steel 5-shelf storage racks. They have the "key holes" to adjust the shelves and are set up so you can build a six-foot tall 2'x4' shelf or a 3-foot tall 2'x8' shelf combination. Saw these yesterday in Home Depot and was thinking that they would make a solid layout foundation.