On Friday morning, 24 hours after reporting the problem, callers to my Comcast home phone number still received the out of service recording.
I called the number the Comcast person gave me on Thursday to follow up on the problem. The person said it's the wrong geographic region. He needed to transfer me to the office that handles Pittsburgh.
Generic music on held, then I'm connected to another office which also tells me their region doesn't handle Pittsburgh port-in requests. I can barely hear the person on the line; then the call drops.
I'll spare you the details. Hint: sometimes psychotic behavior can be rewarding.
The phone was working Saturday morning, and Comcast gave me credit for the days without phone service, plua $20 off next month's bill.
Now everything's going through Google Voice. Let's see how this adventure pans out...