4 service calls, hours and hours of time spent explaining and re-explaining my story and what a cablecard is ("No, it's not a box!"), and a trip to the Comcast local office later, I'm still where I started. No working cablecards. No idea if Comcast will ever figure this out. And another worthless tech visit scheduled for Sunday. I hate Comcast and hate that I have to deal with them in order to have Tivo, which I obviously love. As far as my technical issue is concerned, I now have a Scientific Atlanta M-card that doesn't work. We've gone through 10 cards, it clearly is a problem on Comcast's end. Every card shows "Waiting for CP Auth" and is unpaired. I don't have a menu option for "Cable Card Pairing" that it sounds like I am supposed to have. I don't know what to do anymore. It shouldn't be this hard.