I moved over the weekend from my own apartment where I've had comcast and my Tivo HD set up happily with 2 cable cards for a couple of years now - into my fiance's house where he has his own comcast account and his own comcast DVR. He of course doesn't want to switch to Tivo only, and I am partial to the service that I purchased a lifetime use for. My question - how will the Tivo operate if i go without cable cards? Can I just watch live tv at that point? Or can i record 1 at a time? And will it then not broacast in HD? If I keep 1 cable card (at $1.50) and give up the 2nd (at 9.99) what will the ramifications be? I just want to make sure I'm all primed up with answers before I ax my comcast account, return cable cards, and then have to reinstall 1 or more with a $30 service call.