I'm quite familair with IGMP used in an IPTV environment and I'm curious if IGMP and SDV are similar in one way. As I understand it, the CableCo typically strings fiber to the neighborhood, then from the RT to the home is a coax drop. The coax drops are one big broadcast domain which is why you can see some of your neighbors internet traffic. Now since SDV is a flood-on-request technology, what if my neighbor or another box from the CableCo in my house requests a channel and its flooded down the pipe from the RT, would my TiVo be able to view the channel for the time while its being flooded into my neighborhood? I assume the video traffic isn't sent directly to the STB requesting it (IPTV uses IP multicast), but is there some part of the SDV technology that would hinder this from working?