I saw it at my cousin's house last night, it was very interesting.
It traced the lineage of man back to the "real Eve", who lived somewhere in Africa about 150,000 years ago. They were able to make this determination by reading the "mitocondrial DNA" of humans; looking for mutations, etc. It shows just how closely related all we humans are, as any two humans vary genetically by a miniscule amount. Any others saw the program?