Is it possible to add an "out of office" option so that if a person is taking a day off or vacation days and an action is assigned to them, the assigner receives notification, or is immediately aware?  
I was just playing around with the settings, and I discovered I could add (out of office) after my last name.  This was visible in the action and drop down for my name and would be a great tool for days off.  However, an option of an "in office" and "Out of Office" selection in a user's profile may be very helpful as well.
Thank you!