There’s a (thankfully) growing interest in African genetics, both because of its importance for the origin of Humankind as a whole and also for its more direct relevance for Africans and people of recent African descent elsewhere. Therefore I can’t but emphasize again the great work that Ethio Helix blog is doing in this aspect.
Today Ethio Helix gifts us with a most informative visual synthesis of East African mtDNA in form of bar charts. These are extremely interesting because of the wild array of lineages that this African region has, including quite significant amounts of less frequent lineages like L4, L5 or L6, or also the more extended but still worth studying L0 (and of course L2 and L3, as well as the occasional L1).
So I strongly recommend you to take a look. If you have any problems with the graphs (Google seems a bit buggy on them, he says), I solved them by mere zooming out (some sort of white layer was obscuring the rightmost part of them).
Update: it does not work well with Chrome (slow on Windows, does not work at all on Ubuntu) but it works perfect with Firefox.
A complementary Y-DNA chart is linked at this older post.