[update 9/13/2013]
The c74 “Max For Live Essentials” pack contains a “device randomizer”. Located in Max Audio Effect | Control Devices.
It works in Auto or Trigger mode. And it automatically maps the entire device.
Other randomizers…
http://www.maxforlive.com/library/device/1893/smart-randomizer
an earlier version
http://www.maxforlive.com/library/device/1892/fx-randomizer
Another one:
http://www.maxforlive.com/library/device.php?id=166