Dakells... just wanted to agree that I haven't seen a girl wearing NON-black in corporate-law-recruiting... I mean, that said, I think you could do dark gray and get away with it. I once had a Banana suit that was dark gray with pinstripes and I think it worked fine; but yes, most girls do black. To answer your question, you could do black in different "shapes" + dark gray +/- pinstripes +/- full/pencil skirt?
I have long hair and I used to put my hair up all the time for interviews, but now I've given up and wear it down -- even in, like, fabulous bouncy curly styles... Hah! I kinda thing it's fabulous and perfect.
For our recruiting cocktail receptions in law school, people typically did nice dresses -- but NOT suits. I intend to do that in b-school too. I mean, come ON, one can only own so many suits!
Finally, the WSJ recently had a featured article on how flats are the "new" "power" shoes. I'm totally down! I'm medium height (5'6"), but I love flats and have been increasingly comfy with wearing them in recent years... I now think they sorta sent a powerful, confident signal! (See the WSJ article, Carla Bruni's love of flats, etc.)