I see and will play Nairobi very similar to Seattle - except it's in Africa.
Main differences:
-Downtown is even more corporate controlled, there's no real political power.
-instead of gangs and syndicates, there are tribes
-industry is focused on tourism and space

I want my players to struggle between the corps, the tribes and the free spirits. If they choose a side, fine by me.

Do you have any suggestions and tipps?
One particular question I have is, is Voodoo the dominant magical tradition?