[jjaques]

Any body see the little arcade-style joystick towards the back left of the rover?

[duskwuff]

That's actually the rover's color calibration target, not a joystick.

http://marsrover.nasa.gov/mission/spacecraft_instru_calibr.h...

[jjaques]

Thank you for pointing that out. That's actually more interesting than a seemingly useless joystick. :)