Viewing 200+ TV channels by number & a 4-character station ID is not usable
For starters, I love DIRECTV.
However, I'm wondering when they (and other satellite & cable providers) will begin to think differently about how they present channel guides both online and via the TV remote?
Here's DIRECTV's guide:

These are mainly local channels. Wouldn't it be better to offer a filter that said "Local Channels" that I could click and see these? I'm not familiar enough with the Station IDs to know if they represent ABC, NBC, CBS, etc. Sure, I can generally tell by the programming listed, but still. This would never fly on a major retailer website for listing products this way.
If TV stations were like consumer products...
If this were an e-commerce site, end-users would be driven away if they were forced to only view products by numerical product ID and a short-code. Through history of channel surfing by number, I suppose this method of thinking is engrained in many people's minds.
However, with the volume of channels being what they are, presenting them in numerical channel order is a growing usability challenge. I live in a world where I DVR virtually everything and watch it at a later date. I am completely channel number and station ID agnostic -- I honestly don't know what channels "my shows" are on.
Searching for TV shows
Let's look at keyword search results for "olympics"

Support topics are shown first. Then site pages. Hopefully there's research to support this ordering, but generally speaking, a topic like "olympics" is probably more related to TV programming than a support article. "Satellite doesn't work" would certainly be a reason to show support articles first. Below the fold (scrolling down on a 20" monitor) I see 5 results for TV programming.
I don't know what NBCw vs. NBCwHD means. Unfortunately there's no title for me to click on to find out why this matched my search for "olympics." Let's click "view all":
More empty titles. Again, search results displayed by channel and then by date with no sorting options.
DIRECTV offers a slick option to "Record to DVR" from their website. As such, having the ability to filter search results by content rather than channel and date/time is important because on the web and with the ability to "Record to DVR", the channel and date/time are irrelevant.

