Some days ago I finally uploaded to CPAN a first release of MMS::Parser, which is wandering in my PC since a long time. It's a library to parse binary MMS messages, for the moment supporting the two main "scenarios" regarding the outgoing message and the incoming one.
While it is more or less usable (my colleagues are using it in a demo application somewhere) it really lacks documentation, and test coverage is not complete.
Moreover, I'm planning to produce a real object hierarchy instead of a simple HoH, so I'll probably take a look somewhere around MIME::*.