Hmm, this thread is going into an interesting direction
Whistling - doable but difficult, we will need someone from the signals/acoustics department to do all this Fourier stuff.
With an idea of a dog being controlled, we are moving into the direction of this Sheep game I've posted earlier. Any insight about how this will work out with accelerometers? I.e. won't accelerometer-based control be just a PitA?

Anyone tried this animation framework from Qt? The old approach sucked big time (ok, there wasn't a real animation available).