I thought from reading stuff back in 2008 that part of the rationale of creating the EA was to free up space on the WA by removing come eastern markets from the WA. So, based on the comment above, I would guess then certain large markets in the east will remain mirrored (i.e. locals) on the Western Arc? If that is the case, then I would not anticipate any wholesale swapouts in this market other than for those in a mixed arc setup where only having 61.5 and 110/119 will not suffice for receiving all the HD channels.
That said, my brother here in the Atlanta area (mixed arc setup) says he has received no notifications yet. My cousin with a 1000.2 dish has not either.
I also noticed that Lyngsat is not showing TPs 16 and 22 assigned to either Dish or DirecTV.