Rhapsody doesn't have this yet, but I liked it:

"The first time we heard Grandmaster Flash rapping on a hip-hop track, everybody was like, 'OK, we know this because this is tasso [the rhythmic oral history in Senegal]," he says.

[ NPR : Daara J: Senegalese Hip-Hop ]

Why should you care? Maybe you shouldn't, but I don't want to forget their name.