http://www.getusb.info/usb-cable-get...sd-technology/
But isn't the Kindle 2 just a USB device? Not so; the
ISP1105 USB chip inside can act in device *or* host mode! There's no reason why the Kindle 2 couldn't be software upgraded to initiate data transfers over USB to an SD card.
This seems like a no-brainer for Amazon.