I would think that you could accomplish the dimming through hijack without any additional wiring.

Yeah, by pressing a bunch of buttons, navagation to the dimmer settings, and adjusting the dimmer,
What I am talking about is a toggle switch on the front or rear of the home docking station that you could just press and it would dim the display as it would by flipping on the headlights in your car...

The phone thing would be tricky, but I bet someone here could make it work...
Easiest implementation I can think of would involve one of those light bulb ringeres for the blind.
but even that would involve some fancy rigging, I admit.