>>UTF-8 MIME, I suppose( for many UNIX users).  Of course, this may 

presumably that means commercial unix systems?
i'd have thought that linux, xBSD & company all would support
utf-8.  also, do you mean the 8 bit encoding or just any form
of UTF at all?  i can see avoiding 8-bit transfer encodings because
there are gateways that strip the top bit (and 7-bit transfer might
still be in the RFCs).