What's needed, and may or not be available or even doable with the SDV designs out there, is for suggestions to have a second class status: i.e., they can be overidden by a request by an active viewer or by specifically requested programming. However, a similar situation exists with cable boxes (DVR or otherwise) and presumably those tens of Vista PC's out there with cablecards. Are digital cable boxes usually turned off, or are just the TV sets turned off? With an HDMI or DVI connection thay might be able to tell, assuming they're programmed to note this. The Vista PCs are left running. What can really skew SDV are these folks who have 5 or 6 Tivos (or 5 or 6 cable DVRS, for that matter), most of which are left on all of the time. These installations could wreck havoc in a few specific SDV neighborhoods. Does cable company planning data account for a few of these? Will the cable company have to say you can have only 2 recordable channels? Will they say that each additional recordable channel will cost an extra $50/month? Before you that is outlandish, consider what it will cost them to add an SDV neighborhood to their system just to make one or two Tivo folks happy.