Polaroid is hoping to capitalize on their famous instant cameras of the past, but this one is digital.  The Polaroid Z2300 Instant Digital Camera starts off with a 10-megapixel sensor, a 3-inch display, built-in flash, 32MB of storage, an SD slot (4GB card included), a video-out port, a removable battery, and a mini USB port.  The 1.4-inch thick Polaroid...