I really liked Oyeyemi's Mr. Fox and Hall's Daughters of the North (read Haweswater too but not as fond of it). I've only read Millet's Oh Pure And Radiant Heart which just didn't work for me. I'll have to check out duBois -- I haven't run into her before.

I had to delurk for this post because I have been reading primarily (say 85%) women for over a decade now. Not only do I not feel I've missed anything but I think I've gained a lot by having the time to read many female authors who are so good but so underrated -- so I can't resist the chance to share a few of them (in no particular order):

Helen Humphreys (favorite: Afterimage)
Sarah Willis (favorite: Some Things That Stay)
Michelle Hunevan (favorite: Jamesland)
Carol Anshaw (favorite: tie Lucky in the Corner and Carry the One)
Andrea Levy (favorite: Small Island)
Rose Tremain (favorite: Color)
Valerie Martin (favorite: Property)
Scarlett Thomas (favorite: tie End of Mr Y and Going Out)
Chimamanda Ngozi Adichie (okay she's not really underrated but she's such a fantastic writer, I want everybody to read her books)

And some sf&f writers:

Eleanor Arnason
Karen Lord
Rosemary Kirstein (warning: her books are great but I don't think she's ever going to finish her series)
Candas Jane Dorsey
Laura Mixon
Linda Nagata
Carol Emshwiller

Edited to clean up posting screw-up.