MIDI and ORG are two very different formats. Whereas MIDI is almost like a scripting language (closer to a tracker than to a script language, but the analogy stands
) ORG is a binary format where each byte represents the note, itsvolume, panning info, and such. More importantly, MIDI is a multi-channel format where each channel has a lot of freedom with its notes. ORG i another matter entirely (try putting two notes in the same channel one over the other in ORGMaker...)
It would be possible, but not as an automated process. In fact, to get anything good out of it, it would be necessary to check note by note and determine which notes can be dropped when an equal representation is impossible in ORG, and which should be kept. To boot, because the instruments are different, any automated conversion would result in a very different-sounding song.
Osmose (I believe) and I discussed it in another thread and he found some good stuff about the ORG format, but writing an automated converter is not very likely. And if it were, using a text file wouldn't be very useful - wether it's taken directly from the MIDI or from a file,
The hurdle isn't the format in which we can pick data out of, it's the fact MIDI is a lot more advanced than ORG. Converting from ORG to MIDI would be relatively easy but the other way around will never result in anything like the original.
A converter could work for extremely simple MIDIs though.