Hey, i created a little game using two XBOX 360 controllers. In the joystick sensor settings i changed the index values to 0 and 1 for the different controllers. For the sensors triggered by axis input it works fine but the joystick sensors set to button cause a little problem: They are triggered only when the concerned button is pressed on both controllers at the same time. (even if the sensor only exists for one controller, for example only player 1 can open the game menu by pressing ‘start’. It is not possible unless i press ‘start’ on both controllers)
EDIT: It seems to be a bug in Blender 2.74. I got it working in build 2.72.