Polaroid got famous for making instant cameras and film for the impatient photographer. They’ve fallen on rough times as the digital camera has made capturing a photo and seeing it on a little screen almost instantaneous. But what if you want an instant artifact of your snapshot? Polaroid’s betting you’d find a use for a little battery-powered printer that spits out  a two by three inch color photo. No ink to smudge, either; the colors are embedded in the paper, waiting for the printer to bring them out.The