Would like an option when setting an event to make an event private. There are certain things that go on our main calendar that don't need to be advertised. For example, the general public doesn't need to know when our staff meetings are scheduled and we were able to mark it private. Then it would only show up on the private calendar and not the public one.
A little while ago we released the Public Calendar feature for Events. You can read more about it here: https://community.blackbaud.com/blogs/97/7157 . This allows users to mark certain event as public and also gives a robust sharing function based on Public or Public+Private. This can be further refined by limiting the iCal feed to certain Event Categories.