Update on the Will Call/mailed tickets and why the tickets haven't been sent out yet:
I called the arena box office this morning and spoke to a very helpful person. The reason that the ticket order status was changed from "mail" to "will call" is that the arena is waiting for USFS to confirm whether there is a title sponsor for the event. The change is to keep the tickets in the system until they get that confirmation. Once USFS lets them know about the sponsor, then the arena can get on with printing and sending the tickets.
The helpful person said that once the sponsor issue gets settled, the arena is going to send out a mass email to all the buyers who requested mailed tickets, to let them know that the tickets are on their way. The helpful person also mentioned that mailing is only available to purchasers with a US or Canadian address, so anyone with an address from elsewhere will have their tickets at will-call regardless of what they requested.
BTW if anyone needs to call the arena about ticket problems, the direct line to an actual live person in the arena box office is 425-322-2645 local 6. This bypasses a lot of long recorded messages and/or being redirected to the less-than-helpful centralized call centre.