When he was Brazil's minister of culture, Gilberto Gil was probably the world's coolest politician. He resigned this summer to get his music career back on track. This, his umpteenth album, contains a bunch of breezy new tunes, all of which are as chilled as a day on a Bahia beach, but with a political edge. And while it's more electronic than his previous work, his melodic sensibility is undimmed.