Hi!
With the exception of the first cranky guy, thanks for all the info provided in the other answers.

Interesting about possible bandwidth issues in the west preventing them from adding new HD channels. I'd also like to see NASA TV in HD on Dish but at least I can stream it online. Let's hope that Dish works those things out soon. It does not hurt to keep the pressure on Dish for things that are important to us.
I've downloaded all of the Star Wars Rebels season 1 episodes in HD from on demand. It seems that they took about a week after broadcast to arrive in HD. Good tip about the Roku. Thanks.
By the way, the HD version of episode one of Star Wars Droid Tales is really good and is now on demand through Dish too.