Ability to show event on more than one calendar

Within a wider implementation of Team Calendars, we have one calendar for key 'events' for applications / services. For example, if a very important demo is scheduled or if a period of 24/7 support is in place. This calendar is a mix of project and operations events.

We also have a calendar that tracks similar events for a subset of projects. This calendar is accessible by a specific group only and does not include operations events nor all project events.

I'd like to be able to display events that should appear on both calendars by selecting the calendars, rather than having to create two events and maintain these separately. And it's not appropriate to give a particular group access to the other calendar (so that it can overlay the events) due to the fact that they shouldn't have permission to view all the other events too.

Is this functionality available? If not, it is a new feature that we would very much like to see included in a future release of Team Calendars.

Thanks