Nah, they have plans to use 105 for satellite broadband... but that doesn't have anything to do with what channels are on it, isn't that a seperate part of the hybrid bird?
As for LIL HD. Now, I don't dabble too much in HD, but isn't for the most part the programming everyone wants to view is broadcast nationally on the network stations? Who wants to see local news in HD (I especially don't, you should see the gap toothed newscasters we have here)? So wouldn't it make much more sense for Dish to launch the major markets in HD in every time zone.. say, NY, LA, Chicago, Denver, and Atlanta and have your HD subs subscribe to them like distant local channels?