there's this great song he did with Tunji from Inverse (Nigerian background) called 'Africa'... or something like that. It was a mixtape exclusive, but I cant for the life of me remember whose mixtape or what it was called :? Definately worth looking out for though.
Otherwise I dig this guy's voice. His tone reminds me alot of those old(er) Central & West African singers.
I can see why it could irritate some people but I love it. It's a nice point of difference for him, esp. cos commercial R&B is just so samey.