Re: Further thoughts on preferred printable representations...

Apologies for the very delayed response.

 >    Operating systems are all going to support direct input of Unicode
 >    characters by number. The ISO standard method is Shift-Ctrl-222E for
 >    character 222E.

Thanks for the reference; I wasn't aware of this.

 >    People who put hard-to-recognize characters onto their business cards
 >    are going to add a line giving the Unicode numbers, perhaps in boxes:
 >    
 >       [email protected]            (with a contour-integral sign)
 >    
 >                  +----+
 >       postmaster@|222E|.cr.yp.to       (in smaller type)
 >                  +----+

It's an interesting suggestion, and it might certainly be relevent in
some contexts, but I don't see this being widely adopted for e-mail
addresses.  The internationalized e-mail address will clearly be
chosen to be unambiguous to the target audience; if the person
producing the business card cares about people outside his target
audience (ie people unfamilliar with the relevant script) then most
likely they will simply include an additional ASCII-only address...

	-roy