So, Clickteam finally made a release build of MMF2 that can export to Flash: http://www.clickteam.com/epicenter/ubbthreads.php?ubb=showflat&Number=178830#Post178830
My hopes were raised for a quick and dirty way to make KNP games multiplatform, but there are two big caveats:
1.) It costs $70 American on top of the price of MMF2.
2.) No MIDI support!