Here's the status that I just got from UPS:
"The package was left in a UPS facility. Delivery rescheduled."
I looked it up and the package was coming from this location. That means that a delivery driver from this location either forgot to put my package on the truck or was too lazy to load it on the truck. I called UPS and they said they had no information about why it wouldn't be delivered but the earliest redelivery would be Monday.
So I'm having a bed delivered today from a LTL carrier and my new mattress is sitting at UPS. I'm not about to dig my old mattress out of the dumpster so I guess I'll be sleeping on the floor all weekend. Thanks UPS!!