DRESSED IN BLACK: A Tribute to Johnny Cash presents passionate readings of 18 of Cash's signature tunes that underscore both the breadth and depth of Cash's creative genius as well as the enormous influence his towering presence has had --and continues to exert- -on the face and shape of the American culture. In a kind of »Six Degrees (or less) Of Separation,« evidence of country music's long, snaky roots and intertwined cross-pollination abound on this sterling compilation.