I know how to extract the Agenda file to my PC (eg, via epocware's file
manager). What I get is a binary file. Is there a software that
interprets this binary file to turn it into some easily interchangeable
format (ideally, into iCard).

I am *not* looking for some sophisticated synchronization software with
Outlook or similar (I do not use those stuffs and I do not really want
to). Just a software in C, Perl, Python, Ruby, whatever, that would do
such a conversion...

See More: P910 Agenda -> icard