Sony (NYSE: SNE) calls it a device for people who “want to experience music through movement,” but what is Rolly exactly? It’s a baseball-sized digital music player that rolls and spins as if it’s ...

At this point, the Sony Rolly has been pretty much done to death around here. Murmurings about the music device started surfacing as early as August of last year, and then it finally visited the U.S.