Okay Nathan, this is the story I received last night. Again, I don't think the CSR (strong accent, and hard to understand) fully understood what I was asking either. I was told I could get NBC, CBS, and ESPN in HD, and the box rental for $14.95 a month on top of what I already had (Basic+Extended & internet). There would be $11.80 installation fee.
I asked if it included any other "digital" channels and she said it was just as she described.
Now, I just called again this morning, and spoke with someone that seemed understand a little more of what I was asking: First month is free.
(with what I currently have)
Basic Digital service: $6.99 for the first 6 months then goes to $14.95 after.
Digital with HD service: $11.99 for the first 6 months, then goes to $19.95 after that. The HD channels include NBC, CBS, ESPN, PBS (SHO/HBO are additional). This charge does include the STB. The digital service includes 44 music channels, 45 PPV channels, and 24 "basic" digital channels (Disney, Discovery, Soap Net, etc.).
I think I'll give it a try, at least the six months will take me through football season

I am scheduled for Comcast to "hook my HD butt up" on 8/24 !!