You're wrong on two accounts. First, your message said that TiVo doesn't support SDV. My message says that TiVo can't support SDV. Very different. Second, "the" protocol is not published in any form that TiVo can make use of. There is no single protocol common among all implementations, and there is no commitment from any one cable company not to change the protocol. There is a reason why standards are needed. Once the cable companies commit to a standard, TiVo can do something. Before then, they can't.