Ideally I'd want a physical slider, but it is probably too late in the game for that.
Function keys work fine for me provided I can remember what they are easily. Shoulder buttons might be a good one for this if brightness constantly needs adjusted.
Otherwise I have yet to see good working autoadjust, for me it always turns into some odd periodic function for my screen and it constantly occilates between the dark side and the light side of the force spectrum.
I normally find a balance between DL'ing all the games I own and think are fun, randomly minus a few that I forget, and then get angry when I realize I forgot to download XYZ and there's no cell phone service where I am to download the game I suddenly got an urge to play.
Well you have to walk the line between Intelctual Property laws, and Censorship. There are systems in place such as DCMA, and others have been brought up (SOPA and PITA just recently) but most of them end up turning into censorship of the internet... which is bad.
It's a very interesting topic though and there's plenty to read on it if you look around. I'd start with researching DCMA, SOPA, and PITA.
Could one simply use a DAC to get the RGB to work, pipe HSYNC and VSYNC straight to their respective pins (possibly adjusting voltage) and then ignore the clock and enable pins? or are those last two required?