According to information updated at 9 p.m. PDT Saturday evening an informal canvass of Apple retail stores indicates that about two-thirds of them will have at least some iPhones on hand Sunday.
Let's check iPhone availablity in Apple retail stores in the four most popular U.S. states.
California will take four screens and then some. Might as well get busy:
Now to Texas:
New York, the third-most populous U.S. state:
And Florida the fourth-most populated state: