I just spoke to someone at Adorama and they told me that "it'll be here by the end of the month and you should have it by the first week in July.
Not sure how that jives with the list, etc. but it's more encouraging than ever before. When I placed the pre-order (last year) I was told "you'll be lucky to see it by September..."
Erik, thanks for posting the availability estimate you got from Adorama. I hope that if others obtain availability estimates from their vendors that they will post them as well. I pre-ordered mine from Amazon (a.k.a. the "black hole of information."), so I have no information, but I know they have historically shipped their first models on or about the same day as B&H and Adorama. Still, I would enjoy more "data points" to compare with the story you got.
Anyone have additional information about availability of the 1DX in the U.S.?