[jswinden]

Since you enjoy hacking, most of the developer folks on this forum prefer to refer to a Kindle model by referencing the firmware number, as in K + #. Since the new Kindle you bought runs FW 4.x.x, they refer to it as K4. A model from last year also runs FW 4.x.x, so perhaps you could call this one K4B because it is black and last year's model K4S because it was silver.