You could email Dish asking for a preferred mix of channels. At some point in the future with more bandwidth, they might offer different muxes. Direct TV has a few different themed muxes. I would like different channels in the current mux as well.
Yeah the more they see that people are interested and what channel 100, may motivated them to make some changes. I'm sure there will be anyway when the new birds go on-line. I also assume it will be for mpeg-4 receivers only.