If, like me, you requested your phone be held for will call pickup - it may be worth giving the UPS facility a quick call before you go to pick it up or waiting until the facility has been open a few hours before attempting to obtain your phone.
I received an email around 6:00 am (central) explaining that my iphone was ready for pickup at the UPS facility. I made my way over before work, and I was in the door at 8:00 am when they opened. Turns out the phones are somewhere in the facility, but they won't be moved over to an area where they can be retrieved for customers until 9:30 am or so.
I'm still getting it today, but the weather here in Houston is a serious mess, and I wasted about 1.5 hours this morning in traffic.