I have managed to buy one of the AMOLED displays with a touch screen.  It looks like a real bugger to interface, but I guess the challenge will do me good.
I have got a belly-full of documentation, some of which I don't understand.
I think there are displays that are easier to interface, but they are slower, dimmer, and don't have a touch screen.  
I see three main challenges:
1) building some kind of interface board with appropriate power-supply for both AMOLED and touch screen – this is daunting
2) figuring out driver code
3) exploring ways to save power – perhaps flogging a dead horse.