Published January 8, 2009 • Updated on January 8, 2009 at 1:59 pm The instant cameras that made Polaroid famous may be a thing of the past, but the Concord-based company is readying a digital replacement of sorts. Polaroid will today introduce a digital camera that produces prints right on the spot. The $200 PoGo camera will go on sale in the spring and contains a built-in color printer. It produc