It does that, with flair. If the album doesn't break new ground, it also doesn't fall off. In fact, Jay-Z now stands as the rapper who has best maintained his credibility while still putting up big numbers. The album's key track is ''Come and Get Me,'' in which Jay-Z stares down the playa hatas over a sizzling, percussive track produced by Timbaland: ''I ain't crossover/I brought the suburbs to the hood.'' And if critics think Jay-Z's material obsessions are superficial, he's got an answer for that: ''Magazines said I'm shallow/I never learned to swim/Still they put me on they cover/Cause I earn for them.'' Touché.