Appointment invitiations - supported, to be supported?

As per an earlier post (John Davidson - July 18th), I would like to
know why the API is not firing off invitations to attendees when a new
appointment is posted to a calendar.  The invitees are correctly
displayed (they haven't responded - of course) and all else seems in
order.  Is the API providing this service and we're not poking it
correctly or is this a bug or an upcoming feature.

We're using the Java API.

Thanks in advance,
Derek.