Dish will be shuffling things around in the morning so that they can "Turbo Charge" their HD customers. Here is the info I just recevied.
HD Channels Going Dark
In order to complete the massive system upgrade, DISH must turn off certain HD transponders for approximately 60 minutes in order to Turbo-Charge our HD customers. HD programming will go dark at 4am EST and turn back on at approximately 5am EST.
Ten HD channels will go dark. Local channels and pay-per-view channels will not be affected.
The ten channels going dark are:
During the blackout, standard definition programming will be available to all DISH Network subscribers, including SD simulcasts of HD channels.