I think you may have not understood Paul's suggestion. I believe the
idea is that when the client has a TEXTAREA window there is an option
for the user to type in it as is done now, or pop open a dialog box
to enter the name of a file to send and the content-type. If you
want to upload 10 or 20 files it is presumably up to you to get them
in an acceptable MIME multipart format.
This seems like something that could realistically happen. It is
important to keep in mind that unless the changes called for are
really minimal they just aren't going to happen. At this point it
is not clear that all (or a majority) of browser writers can be
persuaded to make even minimal changes.
John Franks