Beckett Graham and Susan Vollenweider: Two women. Half the population. Several thousand years of history. About an hour. Go.
They cover entertainers, scientists, writers (Laura Ingalls Wilder is my favorite historical woman and their podcast of her was LONG and highly entertaining), royalty, etc. Even some fictional folk are covered (like Cinderella).
I've learned quite a bit about women I knew nothing about, like Nellie Bly. When that happens, I tend to hit the library for a some of the books they recommend to learn more about the Chick. That's right, you can walk away from each podcast with a full list of extra reading, blogs and/or books.
The ladies are entertaining and, while the sound quality wasn't so great in the beginning, it's a lot better.
They have a facebook page as well that stays pretty active and they give fun clues to the next History Chick they are about to podcast on.
Check them out!