I [ed: who?] have posted a program which I hacked together for extracting all NFNT and FONT resources from a MacBinary form of a standard Mac file and dumping the fonts as Adobe BDF files. It has only been compiled and tested on a Sun system to date. It can be fetched from METIS.COM, /pub/mac2bdf.c.
I wrote this tool to be able to use Mac Bitmaps under X Windows and OpenWindows (which take Adobe BDF format files).