I thought, that now this thing is shaping into a very impressive finished product. It would be good to have something more specific in mind.
What are the things you want to see with this, games accessories etc? To start off:
I'd like to see some recent SNKP games ported, such as KOF 13, as well as some new original games in neo geo style graphics.
A retro carrying case for the whole unit and a joystick kind of like the original AES system had.
AES style memory cards anyone? OK that might be hoping too much, but a game card case that looks like that would be cool
I still would love to see shock box cases rather than blister packs for games.
Neo CD game pad?