> Apple's implementation is also backwards. [...]
> You'll notice that when changing the roll of the knob,
> the shines rotate in the same direction (against the roll)
The part that's backwards about Apple's implementation is that tilting the device (roll) should rotate the shines and tilting the device (pitch) should change the size of the shines. Apple's rotates on pitch and changes size on roll.
If Apple's HIG says that the light source should always be directly ahead of you, then you are certainly correct. However, if straight ahead is 0 degrees then you can reproduce the opposite behavior (the effects of pitch and roll get swapped) by having the light source at 90 degrees (reading light beside the chair's right arm). The direction of shine rotation on the knob is reversed by having the light source 180 degrees from its current position (reading light beside the chair's left arm).
Just one thing: I think you would benefit from hosting yout videos in a way that can be streamed. Not everyone has QuickTime installed, so having to download .mov videos is kind of annoying
I like how you're only re-drawing if the motion change passes a threshold.
That's the thing: I wish more people would notify you when they use your open source stuff. Attribution means less to me than simply knowing that it's being used.