I would like portal users to be able to see the status of a ticket, but not all of the emails associated to a ticket (as there may be internal communications that I would rather not have the customer seeing). This doesn't seem to be currently possible, but this would be a nice addition.
Perhaps like the "eye" icon for the comments. All emails in the thread could be "turned off" by default, and only those which were "enabled" could then be viewed by the portal user.
Since I've just learned that the portal user can see all of the email threads, I may not be able to use this feature.