No explicit mention of the San? http://en.wikipedia.org/wiki/Bushmen

From Wikipedia:

The Bushmen have provided a wealth of information for the fields of anthropology and genetics, even as their lifestyles change. One broad study of African genetic diversity completed in 2009 found the San people were among the five populations with the highest measured levels of genetic diversity among the 121 distinct African populations sampled.[1][2] The San people can be considered the most basal branch of the phylogenetic tree comprising all living humans; its divergence node with other humans is the deepest ancestral state that can ever be reconstructed using DNA from living humans.

=== When you visit South Africa, a trip to the Cradle of Humankind is pretty cool.