I recently began work on our 2011 Young Women's calendar using the new system. After some tinkering, I decided we needed 4 calendars: one public YW calendar, one for the lesson schedule, one for presidency items, and one for birthdays. Each of these has different editors and viewer settings so that personal information stays private, but leaders have access to the tools they need.
You can use these ideas to apply to many different auxiliaries:
Young Women Calendar Example
The "Public" Young Women calendar
This calendar is the location where we store events intended for the entire unit to see -- especially parents. This is where events like Temple Trips, Camp, Mutual, etc., belong.
Viewership is public. Editors are the YW presidency and secretary.