Roomba: It vacuums your floor FOR you. Should be a strong enough selling point right? Well, now there's another reason. It magically makes art. It's a little shy, and won't brag about how awesome it is, but just attach whatever light, LED you got laying around on the top of it, set your camera to one super long exposure (some of these photos are up to 30 minutes!), watch in silence, and kablam, you've got art. Check out this Flickr group dedicated to this fascinating trend!