This is absolute insanity...
After several additional calls to 1-800-Comcast, a sales manager eventually agreed to give me 6 months free rental of a DCT700. They told me to go pick it up at my local service center.
I waited in the long line at my local service center after work on Friday afternoon, only to be told they were all out of digital boxes, and to come back first thing Saturday morning. I asked if they could just hold one for me, and they said no, it was "first come, first served". I pointed out that I was "first come", but they weren't impressed. The service centers apparently have no mechanism for reserving equipment for specific customers.
First thing Saturday morning, I waited in another long line at the service center, only to be told they were all out of DCT700's and didn't think they would be getting any more. I asked if they could special-order one for me, and they said no. The service centers apparently have no mechanism for ordering specific hardware from Comcast.
They told me to call 1-800-Comcast and just have one shipped out to me. I called, and after 45 minutes on the phone with various people, was told they could not send me a DCT700. Apparently, they can put in a request for a digital box, but the shipping department will just grab whatever brand and model of box they have on hand. Comcast apparently has no mechanism for shipping specific hardware to customers.
The Comcast sales manager suggested I drive to a more distant service center and see if they have one in inventory, although he doubted they would. I asked if he could call the service center to find out for me, rather than drive there and stand in another long line. He said no, there are no phone number for the service centers. Comcast apparently has no mechanism for contacting their service centers.
I pointed out that AT&T offers a free DVR to their customers, and asked if he would be willing to offer me a free replacement for my ReplayTV. He said no, he couldn't do that. Apparently Comcast sales managers have no mechanism for making special accommodations for disgruntled customers.
I politely observed that there was no incentive for me to stay with Comcast, and that I would now be looking at switching to AT&T. He told me he was very sorry to hear that, and wished me a good day.
So here I sit, with my perfectly functional but now useless ReplayTV. There is a digital converter box, distributed by Comcast, which will enable me to continue using the Replay. There just isn't any mechanism for getting one.