Valmarius
First Post
The article did not reference Nyambe, but it did provide a couple ideas for possible alternatives. One was described as an "African Atlantis", a "bleeding-edge technologist culture that architects magical machinery, who are black, or an ethnography of the cloud-dwelling black merchant princes who deliver their wares via airships."
Funnily enough, In a recent "Lore you Should Know" segment on Dragon Talk, Chris Perkins talks about the island of Lantan which is just Northwest of Chult, and I'd guess has a predominantly black population.
It's apparently a very high-tech, high-magical society and the only place in the Realms with the ability to make smokepowder (magic gunpowder).
He also said that we'd be seeing more of Lantan soon. So this might be the 'African Atlantis' the author has been waiting for.