A few notes:
Last year, after Madrid, Aranxta was #8 and Anna #9. Conchita #12, Kim #14, Justine #16, Mary #18, Jelena #19, Sandrine #21, Chanda #22, and Silvia #23. A lot has changed.
The post US Open points are not even remotely like how the rankings will look. The 435 point difference between #1 and #8 is almost negligible. There are still 3 Slams a Tier I and 5 Tier II's from now to then.
Lindsay does not have time to get her feet wet. She needs to hit Eastbourne hard and keep achieving big. 10th in Post US Open points, and the field still has a Slam to add to their totals before she starts. After the US Open it gets even tougher for her.
Martina would be in pretty good shape right now if not injured. If she can't get back by around San Diego, she's got big problems.
Serena is likely poised to remain in the top 3 until at least the year-end Championships.