As I write, I've just started listening to Bjork's new album, "Volta", for the third time. The first single, "Earth Intruders", is playing right now, a kind of euphoric marching song driven by three radical beat scientists: freestyling avant drummer Chris Corsano; Congolese troupe Konono No1; and, most notably, Timbaland. It's pretty dizzying, as you might imagine.