Just here to add to the "thank you"-list.
Since I don't have so much time any more, I don't play a lot of adventures, and specially on the Pandora I more and more do quick and short games. Never the less ScummVM is among the absolute essentials for me! Sometimes I just start up Monkey Island to see how great it looks (and sounds, since I have the Amiga Version) on the Pandora! (Which reminds me: I usually prefer the original aspect-ratio, your plan for 768*480 sounds good, though).
So thanks for keeping this up to date! It's just a matter of time until I will play through another classic adventure again on the Pandora (the last one was "Full Throttle", played together with my girlfriend. I still remember because it was so much fun)!
About better controls: these Adventrues just scream for using the touch-screen. But when you do, you loose the ability to just scan with the cursor for usable objects (mouse-over) because it usually registeres a left-click immediately (so in Monkey Island for example Guybrush walks immediately, or opens the door, and you can't just "look" around with the cursor to see what's the in the first place).
Maybe one could assign the shoulder-buttons (or a more suitable key) to "no-click-mode", meaning: while you keep the button pressed, you can move the cursor with the stylus to any position on the screen without triggering a left-click?
I think some of the other unintuitive controls (like using the F-keys to get menus, save, quit) are from the original engine. They are very strange, but I still think one should keep them ... it's how it was, nobody would re-assign "start"-button in an emulator either