The Blues may be "nothing but a woman cryin' for her man" I as the great Georgia White once observed. Unfortunately for the blues world, there are precious few women crying today. The image of the Blues Mama, once a roots-music staple, has all but disappeared from the musical landscape.

Or has it? Don't tell that to Marva Wright, or she just might turn that powerful voice on you. Marvelous Marva sounds less likely to be crying for her men than grabbing them by the throat and screaming at t...