i had this message a while back, and was going to post it, but decided against it, as at the time, it was still 'sensitive' information.
at the moment, when re-pairing a card, they are not yet asking for this extra digit, or ive not yet been asked for it, even when sorting cards out on these receivers that DO have this new information. im almost certain that the receiver ID is the mac address (not ripped one apart yet to check lol), so id assume its just a matter of time before they switch from using phone lines to confirm billing data on the card etc, to doing it in real time via your broadband connection, or possibly the card itself being a 'dummy' and the channels are actually decoded via ehternet, in the same way CS works now, and the card just contains your 'line' details password, with the MAC address (receiver ID) being the 'line' username
maybe these boxes running the new software, will be beta testing the next generation of encryption systems without anyone actually realising it? they will be concentrating so hard on 'card sharing' when its not really the card doing anything at all.............?