The USOpen entry list actually came out today, Tues Jul 15. I don't have it but you can probably call the USTA. I'm interested as well to see if Anne is entered.
Yes, they use this week's rankings for entries and next week for updated qualifying list. I'm afraid neither Anabel nor Joanette are entitled to an injury ranking as they have already used it before (u can use it only once in a GS). On the other hand is quite probable that Kremer and Diaz Oliva will use it.
From this week's top 104 Hingis is out for sure, Panova almost sure, and Anna K quite probably out, while Kremer and Diaz Oliva most surely will use her SR to compete if they're fit enough