This might be a common question, and if so I apologize. I am inerested in possibly getting a couple of TIVOs for my home. I am a Directv subscriber, but because of monthly cost am considering jumping to cable and using TIVO rather than the cable DVR. I hear a lot about cable cards but don't really understand them. From what I thnk I know, it is a card you use in your TIVO that allows it to get the information it needs from the cable feed? So, if I use a cable card, do I need one of the cable boxes in order to use TIVO? And, if I don't need the box, I assume this means I will save some money on the bill by not needing one of the cable company HD boxes at the tv? Anyone use cable cards and know the basics of what this does to the bill? Thank you and have a great one.