Anne Marie - No, you don't need to be a high ranking woman Aikido Instructor to inquire about the "list". I apologize if I implied anything of the sort in my post
Personally, I'm suprised that there are not more high ranking women in Aikido. The whole nature of Aikido (use less of your own energy, keep weight underside, etc.) seems geared more toward women (just like Wing Chun Kung Fu). Now, don't get all defensive here. I'm not saying that women are somehow less physically capable than men or more passive or anything of the sort. What I am saying is that women have a natural ability to maintain there balance better and keep their weight underside due to their anatomy. If you take a woman and a man of equal height and build, the woman will have a lower center of gravity due to her anatomy. Because of this simple fact, women are able to keep their weight underside much easier than men. This can easily be seen by a simple demonstration (I'll spare everyone the description of the demonstration, so just trust me).
I've had the opportunity to train with many different women Aikido Instructors and students and can honestly say that the women are generally able to perform the techniques more fluidly than the men. My wife for example has an incredibly fluid Shihonage (she doesn't know this, but I wish mine was as graceful as hers).
Of course, all this could be coming from the fact that I just had my Wisdom Teeth removed and the drugs have not worn off yet - hey, where's my Jello?
Have a good day!