Kim, according to the show, the most primative (read oldest) is from an African woman who would have lived near Tanganyika, but interestingly, they located a man in Turkmenistan, who had the most primative DNA outside of Africa, which indicated to the researchers, that his ancestors were where the African DNA split up into the Oriental/Native American, Aryan/Caucasian, and Polynesian/American Indian, as well as several other sub-groups. I believe the show was called "In Search of Eve", and was on the Discovery Channel several months ago. By tracing the gentic markers, and seeing where new ones occur, the maps show the results of incredible migrations, long before we previously thought possible.

I'm sure that other discoveries will refine or change this information, but the documentary was well worth the technical jargon which infused the first part of the show.