I think all the ideas for new historical dolls are awesome! I've been thinking about a 1960's doll, too, ever since I got the Hippie Halloween costume. :>)
I think an Asian doll living in San Francisco during the late nineteenth century would be cool, too.
What I'd really like to see--and I know there are a few others with interest in this--is a Hawaiian doll. I think it would be awesome if she was somehow involved in the court of the last Hawaiian queen, and there's this tension between the Americans and the Natives and how the girl would adjust to everything.