I have two thoughts on this:
1. While I'm sure there are people out there who want more SD channels, and I don't begrudge you that, I think you have to face the fact that you're in the minority (not in terms of number of subscribers, but in terms of those who are actively clamoring for more/different SD channels) at this point, that things are moving toward digital/HD TV whether you like it or not (been in a Best Buy or Circuit City lately?) and, more importantly (at least from D*'s standpoint), HD and DVR is where they think they are going to make their money in the next few years, and early indications are that they're right.
2. Sorry if this is a dumb question, but I'm not as up on the technical side of things, at least with SD: Can they change over the SD channels from MPEG2 to MPEG4 to save bandwidth, improve PQ and/or add channels? Yes, I realize everyone with standard boxes would probably have to change them out.... honestly, I'm not even sure MPEG2/MPEG4 comes into the equation with SD, but it's a thought.