Although there have been some partially-black American skaters in the singles field that have reached elite level (Derrick Delmore and Rohene Ward came to mind), I noticed their absence in ice dancing and pairs. Is it because the pools are smaller to begin with for pairs (except Tai Babilonia) and dance? Minorities are at least visible in Canadian ice dancers, but in US I can't think of anyone (ETA: I just remembered Lynn Kriengkriarut is Thai and Naomi Lang is partially native American/Indian).
OT: In the south and perhaps most of US, the sentiment about what counts as "black" may still follow the antiquated "one drop rule." I'm not trying to deny kwanatic's experience. However, living in the Washington DC area, I am conditioned to not "judge people by their skin color" (so to speak) or at least keep my mouth shut tight until they tell me what their background is, because my assumptions of people's ethnicity have been proven wrong many, many times (also I'm really bad at guessing people's ethnicity in the first place). Lots of people who look "black" in the US context think of themselves in completely different terms if they are from Latin America, South America, or southeast Asia or ... Polynesia.