Sent a colleague an e-mail the other day, and this is the automated message I received in response:
I will be on vacation from Monday (June 30th) through Saturday (July 5, 2008). If you experience an emergency that you believe requires my attention please contact my office at the number below. Please note that most emergencies require that you first call 911, the police or seek immediate medical attention.
How smart is that?
It certainly stopped me from making a call.