You could try going to Zap2it.com, selecting TV Listings at the top right, then entering your zip. I found that going directly to Comcast to get my channel lineup they are extremely inaccurate. (out of date)
Yeah, Zap2it might be useful. It doesn't give a description of what the channel is about (i.e., Sports, Religion, Shopping, Food, Cartoon, etc.) but the names of the programs scheduled can give some idea. I'll use it to prepare a list of channel numbers for TiVo to ignore, that will help quite a bit.
tanstaafl.