You can easily tell if you are receiving a channel by analog or digital. Simply press the record button on the remote. If you are presented with a quality selction (basic-best) then that is an analog channel. If you see no quality selection, then that is digital. This same info can also be found in the diagnostic screens, but using the record button is the easiest. There are three standards defined for transmitting video in the US. NTSC is for analog off-the-air (OTA) and on cable. ATSC is for digital transmissions OTA. QAM is for digital transmissions over the cable. Most new televisions support all three. Rates vary by area. However, my Comcast ratecard from May 1, 2008 shows: Digital Starter is $1.99 more than Standard Cable ($51.74 for Liimited + Expanded Service). The first cablecard is included in that price. The second cablecard in my S3 Tivo is an additional $1.99 Digital Classic is $14.99 more than Standard Cable. Digital Preferred is $15.95 more than Standard Cable. This is the package I subscribe to. Sports Entertainment Package is $4.00. Then we get to the additional digital outlet charges which seem somewhat confusing. I am not subscribing to any digital service on my 2nd Tivo so I can't vouch for exactly how these would be billed. But, an Additional Outlet for Digital Starter is $1.99. However, Digital Additional Outlet Service is $7.95. The first cablecard on the additional outlet is included with the charge for the digital outlet. So, I am assuming that if I only wanted to add Digital Starter to my 2nd Tivo, it would cost me $1.99. However, if I wanted Digital Preferred on it, I think it would cost me $7.95. There is no separate charge for HD channels. I get about 25 HD channels with my package. However, there is something called HDPak which costs $6.99 and would get me HDNet and HDNet Movies. To further complicate things, I have a one year special which I thought gets me Digital Preferred for $10. However, I also seem to be getting the HDPak with it. If you are getting 3 additional cablecards for $1.99 each, then they aren't charging you for additional digital outlets. If they now want to charge you $7 for HD service, perhaps they are charging you for additional digital outlets. If you have two Tivos and no cable boxes, then you might need to pay one additional digital outlet fee. However, they should not charge you additional digital outlet fees for each cablecard. See the Comcast Cablecard FAQ at http://www.comcast.com/customers/faq/FaqDetails.ashx?ID=2651&fss=cablecard Regarding internet.... I am paying $30/m for a one year special. I got the rate when I complained about them changing the rate without notice after Comcast bought out Insight in my area. Insight offered a $10 discount for bundling cable and internet together. Comcast apparently doesn't. BTW, you should only need 2 M-cards, one in each Tivo HD. This would save you additional cablecard charges and/or the bogus additional/HD charges they are trying to hit you with. I am still not convinced your cablecards are working properly. Did you ever receive any HD channels? I suggest you march in to a local Comcast office and pick up a copy of their current rate sheet and channel package list. This would help you with ammunition to fight bogus charges.