I currently sling to my Kindle Fire HD (not HDX) from my Hopper with Sling (HWS) without problems. Had to sideload the Dish app to my Kindle but that is fairly easy. I use to have a 722 receiver and sling adapter and it worked with the Kindle Fire HD as well.
Wonder if this will work with my wife's Nook HD that she is getting for Christmas. Being able to watch her shows from anywhere in the house would make it an even better gift.