My dad has 2 Motorola HD DVRs. I saw a Reuters story about Comcast getting ready to roll out TiVo DVRs, but they were rather vague, because it gave me the impression that EXISTING customers would be getting this service, but if that were true, wouldn't that mean that we would all have to swap in our current boxes to get this TiVo version instead? I'm no DVR expert, but I thought TiVo wasn't just a software thing, where they could just install it on any given DVR. Could someone please try and explain to me what exactly this whole deal is about? It would be kinda cool to have TiVo at my dad's, but I'm not sure where all of this is leading.