The documentation for the Arduino Library only mentions UNO and MEGA and its derivatives.
Is there a reason why the library should not work for a DUE?
Al, why don't you try it out! Make sure you select the correct Serial port for you Due and adjust your wiring to suite.
Because they just use the Arduino IDE 1.0.x and not use the 1.5.x .. So they didn't try the DUE and not mention it. You can try to put it into 1.5.x IDE and select the board to DUE, and it should work well.