No... you can't subscribe to a time zone. Anyways, apparently no one posting here actually has cablecards, so why don't we all go to this forum. Find your area and get actual reports of cablecard do's and don'ts from people in your area, as well as how switched video is screwing things up for cable card.
1. I have monitored several Tivo Series 3 forums and from what they describe once the Cablecard is provisioned correctly they receive all the linear HD channels. I have also talked at length to Comcast service technicians and they have pretty much said the same thing. There have been a lot of problems with compatibility, some are caused by bugs in the CE equipment, some are caused by bugs in the Cablecard firmware. Obviously there is room for improvement in the certification process but there is probably no way to simulate all the different combinations of software and hardware that exist in the wild within a lab. When the Series 3 Tivo launched there was obviously a lack of communication from CableLabs and the head offices of the MSOs and again confusion reigned at the local level...Microsoft should be thankful that Tivo went first and was able to get all this straightened out.
You can sit around here and post your hopes and dreams about cablecard in your Vista PC all day long. But a quick review of ANY independent information will tell you it's practically DOA.
SDV has definitely thrown a wrench in the works...but my understanding is that the FCC is requiring Cablelabs to provide a solution if the MSOs wish to deploy SDV. Yes, that pretty much means Vista MediaCenters are not an attractive solution right now and the early adopters of the Tivo Series 3 are probably going to get screwed but sometimes those are the breaks when you are on the cutting edge.
Don't believe me, look it up for yourself... Or don't, keep your head in the sand and tell yourself that one day you will be able build your own ocur box and watch NFL sunday ticket and btw you'll be dating the tooth farie and life will be good!
I have personally have held the opinion that it is going to be a long time before you can build your own Vista Media Center PC that has a direct interface to the provider, no matter if it is a Digital Cable Tuner or a Satellite based solution. And yes, I understand that makes a lot of PC enthuisats unhappy but I don't think the content owners are going to accept it any other way. If that is a dealbreaker for you, sorry.