I was wondering about an "EMUTOS format" that would work more easily with EMUTOS and the Amiga, but not necessarily compatible with ST or Amiga formats (ALA A-Max format), but then I read:
Originally Posted by Toni Wilen
WinUAE (and uaeunp sources) and aros m68k trackdisk.device has PC MFM to sectors decoder included that should be quite easy to use.
So, it sounds like it would be better to just go for MFM...
Also, as for applications, if you could get an Amiga serial port MIDI device to look like an ST MIDI device, it might be nice for people to play with the MIDI software, which I always heard was pretty good...
(I never used MIDI, so I'm not sure..)