Adding sounds/music/videos
I'd also like the option of adding sounds (scrolling through list, launch/exit games, music.) It'd make great touch to the visuals. And speaking of visuals, it'd be nice to display game videos, and if no video is provided, revert to a screenshot. That's one problem I have with MameWah.
Sure do. These are just some sounds I was toying with. If you think of any other types of sounds, lemme know and I can probably whip em up. 
http://www.720k.org/pub/mgalaxy-sounds-01.zip

http://www.720k.org/pub/mgalaxy-sounds-01.zip