Did a search and could not find out any information about channel changes on Dish when Sirius changes them on May 9. Anyone have success in finding that info?"
May not be an announcement, Dish doesn't even really announce many TV channel changes! I'm sure whatever the channel number changes made will reflect in the Dish channels, at some point. The new channels will either show up or not, any channels going away will do so.
Assume that the Pulse will move to 6015 (99-15 on Hopper), Studio 54 will move to 6054 (99-54), Pop2k will start for Sirius Radios, so add that to 6010 (99-10). I know of others, but those are the more known channels on Dish.