Available for now at
http://nisoftware.com/files/MIME-Xparser-0.0.tar.gz
The structure of a mime document is parsed, and user supplied content
handler methods are invoked as appropriate.
Nothing is extracted or decoded. Your handler can do what ever it wishes
with the data it receives.
Not thoroughly tested yet, but worked on a series of spam messages I
wished to examine.
Comments welcome, including suggestions for any alternate module names,
and of course anything else.