I called today. I said "Hello, I'd like to upgrade my STB to an HDTV capable STB."
She said, "Hold on, I don't know if we have those yet." She came back pretty quickly and said "uhhm, yes, the installation is $50 but you have to call Moving & Change. The phone number is xxx, they will help you."
Well, of course I didn't believe that. I said thanks and then called the other number.
Me: "Hello, I'd like to change one of my ..."
She: "Uhmm, let me check"
She: "No, we don't have those yet."
Me: "Do you know when they'll be available. I just want to know when to call back."
She: "Oh, I can write it down in your account so we call you when they are available. What's your primary phone number?"
Of course I don't believe any of that. I'll call again Friday and then next Tuesday, and so on.
PS, they now say "Comcast formerly AT&T Broadband" in their messages.