or you can print out the pre-sign form from apple and tape it to your front door. they will leave the package there even if no one's home. obviously you have to determine whether or not it will be safe.
I've never had a problem with packages left at the front steps, but if any time for someone to steal it, it would probably be this instance (Murphy's Law). It would cost $849 to replace it. The AppleCare+ won't cover it and you basically sign off on delivery so Apple and the carrier are absolved from any binding responsibility. $5 for the delivery change seems worth it since it would cost me more money to take off from work to hurt down UPS (plus not having it over the weekend to play with would suck knowing it is sitting at the UPS facility).