Following our transfer of eMail and calendaring for students to Google we now have to decide what to do for staff. We have several options of course - do nothing being one of them. That would leave staff with a calendar with good scheduling functionality but without the ability to subscribe to different calendars, and with a clunky webmail client and nowhere near as a much storage as the students have. Or we could implement an integrated calendar and mail client such as Zimbra for staff. This would give a better user experience in both mail and calendars, but wouldn't solve the filestore problem, and there would be a cost to us for licenses, hardware and support. Or we could move staff to Google. That would give staff and students the same experience, reduce our support and licence costs, and give staff the same filestore as students. But, currently the calendaring functionality for scheduling meetings is not as good (although we're told improvements are on the way) and there are some data security and privacy issues which will need addressing.
So, pros and cons for all options (and many more than above - I've just summarised the main ones), so we've just started a quick review of the options with a view to making a decision in time to implement for the next academic year. One of the most difficult tasks if we decide to move to a different calendar will be to transfer existing diary entries. Fairly straightforward for your own individual calendar, but not as straightforward for meetings in multiple diaries, repeating meetings, multiple attendees etc.
My own personal view, and I must stress this is a personal view and it might not be shared by all members of the team, is that the Cloud is the way to go. Yes, there are issues, but they are not insurmountable. But, there's more than just me on the group so we'll see how things go.