If the term "living legend" weren't a stock cliche used by every celebrity ass-kisser around, we might use it to describe boogie-woogie piano giant "Pinetop" Perkins. It's just as well, though, because even that won't fit him. Pinetop is more of a living repository of blues tradition. If you haven't been clued, let us tell you: this man was taking the place apart before Prohibition. Possibly the last great blues pianist of his era, he's played with everyone from Big Joe Williams to Robert...