All,
What Marshall has just said is very good and correct. Since I am not as
politically tactful as he is ...
Once MIME becomes a raging success the PEM folk will find themselves asked
to switch to MIME style encapsulation for bodyparts rather than the RFC-934
style PEM uses now. This will be in the for interoperability with MIME.
This means your UA's will have to be rewritten at some point to use MIME.
If you do the rewrite now, rather than later, you have less of an installed
base to worry about, fewer users to retrain, etc etc.
David