The following 01/09/2013 excerpt is from Comcast's Ted Hodgins, Sr. Director, Video Product Development - Navigation, in Media & Entertainment, "New Features for Scientific-Atlanta/Cisco Cable Boxes" blog
. . .
The X1 Experience is the eventual goal for all of our high-end cable boxes regardless of geography or existing plant infrastructure. We do have the X1 Guide running in customer homes in SA-Cisco areas of New Hampshire and with employees in SA-Cisco areas in New Jersey.
. . .
See »Re: New Guides for SA/Cisco Areas (Info from Ted Hodgins Blog)
Things have changed since this was posted with the X1 Guide now officially available to Comcast customers in SA-Cisco areas in New Jersey. I think there was a soft launch when this was posted.
The requirements for getting the X1 box have been lowered since the Boston release last Spring. At that point it was only for "new" triple play customers. Later it became available for existing triple play customers. I think the requirements will keep being lowered so Ted's eventual goal will be reached.
It might take a while for the reduced requirements to filter through Comcast sales organization so keep checking with Comcast--
Cisco RNG 200N & SA 8300 HD DVRs-S26 Guide