Sort by metadata

Being able to filter the Calendar by editorial metadata would be most useful. We have a case where news editors would like to view a calendar of upcoming posts sorted by when writers say they are expecting to deliver their copy (day and hour). That would help the news editors manage the intraday editing/publishing schedule. We have created a custom editorial metadata item for copy ETA which let us have a workaround using the Story Budget (and the info is available a click down on a Calendar item, of course) but it would be so much better to see it in a single Calendar view, as can be done for custom statuses.