Don't worry, even if you can't spend a lot of time we all appreciate your work very much.

To my understanding, the most important bits to be fixed are all relative to UI and keyboard. These are my most wanted features/fixes:

1 - All keys working and selectable to any function, no matter the language layout.
1.1 - If point 1 is not possible: Keyboard automatically changed to US English at the beginning and then switch back.

2 - Possibility to redefine hardware keys (i.e. I'd like to use volume keys for volume control and not save states).

3 - The UI is very small when starting SDLMAME, would be great to show it maximised at the beginning.

4 - Accelerometer for analog control in selected games (i.e. car driving games).

5 - Touchscreen for analog control in selected games. (i.e. Arkanoid in portrait mode)

I don't really care for non working/slow games. Once the port is stable and usable enough to be in extras, I'd think in possible changes to improve the speed.

Great work anyway!