Hi,
I have made Python bindings for libmusepack 1.1, as well as a simple APEv2 reader/writer (it only finds and writes tags if they appear at the end of the file) module implemented in Python.
They can be found at
http://svn.sacredchao.net/svn/quodlibet/tr...unk/pymusepack/ with some simple example code that shows off most of the API.
Maybe someone besides me will find it useful; I'm using to support MPC in my Python-based audio player/tag editor.