Here's a follow up to my earlier posts. Comcast came out again tonight. This time they sent a Lead Tech from Comcast. He pulled my cable cards out and (surprise!) the card that wasn't working had "No Good" written on the label but someone had cross it out with a black marker. Doh! He replaced it with another single stream cable card and it seems to be working now. I still have "Waiting for CP Auth" on the new card but I get all my channels on it except HBO, which they are giving me free for six months because of all the failed CC installations. HBO works on card #2. Also, the first thing he tried was installing a multistream card from Scientific Atlantic. These cards DO NOT WORK in TiVo HDs but they may work in Series 3 TiVos. If you have Comcast in an area that uses SA cards, especially South Jersey in Camden County, make sure they bring 2 or more single stream cards. Overall, it's working 95% of the way so I'm pretty happy.