Been doing some testing, so thought I'd start a thread and see if we can get some more of these machines emulated.
Stir Crazy - Classic done, art available, so DX possible
Wet n Wild - Classic done, not great art available, so DX unlikely.
Pacmania - No roms I can find, so no idea if it runs.
Disco Inferno - Roms and art available, have a very basic starter layout done, but with no Bacta test mode and manual for machine this is not going to possible.
Top Gears - Roms available, has bacta test mode, with all info for cards, so definitely doable. I have a basic start layout running ok. Art needed for DX.
Jiggery Pokery - No roms available ? Guess it's doable if we have roms, as German version is running.
Other machines - Any others people can think of, so we can see what we have. Someone mentioned Jail Break and also that other manufacturers may have done some machines as well.