One of many new features that will be coming in ZCS 5.0 off the top list of RFEs is the ability to search calendar. You can also tag calendar events and flag appointments. We took a short screencast of searching the calendar, flagging appointments and tagging.
In this screencast it shows the HTML lite client. Searching both local and shared/mounted calendars. The demo also applies tags and searches or lists appointments by tag. Take a look and let us know what you think!
Searching, Tagging and Flagging Screencast 5.3MB .mov Quicktime