There are many Eritrean and Ethiopians at my Serbian parish, but I don't know if they have been received into our church officially or simply come to pray. I honestly haven't noticed if any of them take communion, not because I'm ultra-pious and too worried with my own sins, but rather I just haven't really thought about it during communion time. As I understand it though most Ethiopians almost never commune anyway, so I'm not sure it makes a difference.
The situation is also odd because there is an Ethiopian Orthodox church in Kansas City. I think there might have been some break over the Immaculate Conception controversy in that church in recent years. Also, I know many of these immigrants live in walking distance of our church. The Serbs and Ethiopians in Kansas City are on very good terms, as the old St. George's Serbian Orthodox Church property was sold to the Ethiopian congregation. As I understand it, they actually kept the Serbian iconostasis, and so there sits an icon of St. Savvas in an Ethiopian Church. This kind of stuff could really only happen in the United States, which is like a religious bazaar.
Also, as an aside, I know for certain there is an icon of one Oriental Orthodox saint in our nave. I'm not sure I agree with it, but then again I'm a catechumen, so I keep my mouth shut. Whoever the saint is, I think he is one of the most popular of the Ethiopian saints. There is a bird drinking his tear, if that helps with identification.