For a while now, a friend has been mentioning a forthcoming uniparental study on Eritrea to me and just recently he got his hands on its abstract (I'm not sharing all of it but just some of it):
"Eritrea is strategically located at the eastern part of the African Sahel belt over what is believed to be the original scene of modern humans’ evolution and dispersal. The country’s peculiarity is also reflected in the presence of nine ethno-linguistic populations that speak Cushitic, Semitic and Eastern Sudanic languages, makes it all interesting in addressing some of the significant questions pertaining to history of human expansion within and beyond the African landscape. Major Y chromosome haplogroups A (24.73%), B (7.52%), E (46.24%) and J (21.51%) were detected in all Eritrean samples. Further high-resolution analysis of the macrohaplogroups resulted in high frequency of A-M13, E-V32 and J-P58 with different proportions found in the populations analyzed to indicate the prehistoric and historic demography of the populations."
I'll hold back on any comments until we get the full-paper but I must say... I'm extremely excited at the idea of comprehensive mtDNA data for ethnic groups like Afars, Sahos and Tigres.