Polaroid may have bumbled into the greatest brand niche in desktop printing history. Its Grey Label printer is essentially the Instagram of printing -- a clever portable printer that renders fascinating-looking printed images basically on demand. The 15-ounce unit works with any smartphone, tablet or mobile device. Take one of those simply awful smartphones pictures, flow it into the unit, press "print" and ... poof ... out comes a terrific-looking instant print. Really, anything looks great: reference shots of product, snapshots of you and your customers, even the most basic snapshots. With a bit of imagination, you should find that a printed-on-the-spot image is heck of way to get customers to remember you. If you are looking for clever way to put a little zip in your mobile sales, printing up a bit of business memorabilia works. And so does this Polaroid.