Given enough time, Adobe could publish the MM othersubr code under an OpenSource license. However, although the Adobe Type Dept could request this pretty quickly, it would take many months to actually happen - the this will sit at the bottom of the legal groups's priority list for a long time.
I am not familiar with the context for this thread. However, it seems to me that the font forge code could simply be eliminated. This MM subrs in question is needed only for making new MM Type1 fonts, which is a bad idea. The MM format is not supported in OpenType, and over time, support for authoring with plain Type 1 fonts is getting steadily sketchier. Of course, MM Type1 fonts in existing documents will need to be supported indefintely – PDF's and fonts are forever.
- Read Roberts
Adopbe Type Dept