PS3 Charging Station
Although definitely not a game, I have found this to be a pretty cool product. It helps alleviate some of the clutter in the area where I have my PS3 setup. I have 4 controllers so that I can play multi-player games with my kids, friends and other family members. The Charging Station allows me to stack two of them in vertical style in no more space than a regular controller, but I can also connect another UBS cable so I can charge another controller as well. That way I can continue to rotate controllers when I play single player games.