To set the record straight: this is not the end of ED.
To put it clearly and simply; the only change is that ED allocations now come out of the dealer's own allocations. Which is pretty much what Jimmy explained.
The confusion comes from the fact that Steve Thomas announced that they're not doing it anymore. Basically the way I see it, they sell so many M3s (standard/domestic delivery) that it's not worth it for them/there's no point for them to bother giving up one of their allocations and give you an ED.
Looks like a lot of people got scared/pissed/disappointed (understandably so) but don't worry, there are plenty of other dealers out there that are willing to give you the ED you want.