I haven't used a Tivo in almost 4 years because Comcast/Xfinity wasn't supporting them with OnDemand. But it looks like now they're supporting the new boxes with full OnDemand access. I have a couple of questions that maybe someone can answer? 1. Based on a recent post, it looks like it still requires a CableCard to work. Is this true, or is the hardware such that it's compatible right out of the box? 2. Assuming you need a CableCard, do you need just one, or do you need 4? I know on previous HD Tivos you needed a separate card for each tuner (i.e. if you wanted to be able to record 4 shows at once, you needed 4 separate cards). 3. Quality and support for CableCard applications used to be horrible. I remember stories of people needing to switch out the cards multiple times before they found one that worked. How long has the Xfinity/Tivo service been available? Are the Comcast service techs going to be able to support it? I can't handle needing to make 20 calls to Comcast before I get it working as advertised. 4. Is there a separate fee paid to Comcast for the rental of the CableCard. As it stands now, the economics are pretty compelling to go with a Tivo box. Comcast charges $16/month for their HD DVR service. If I can buy a Tivo box, pay them $15/month and not pay some additional fee to Comcast, it's a no-brainer. I can "amortize" the cost of the Tivo box very quickly given how much better the service is than Comcast's DVR software. 5. Any other opinions on this topic would be welcome. Thanks.