..ran across a documentary, somewhat dated (early 90's) called "Deep Blues." The late Robert Palmer, from Rolling Stone magazine, takes a tour of the South (starts out in Memphis and ends up in Mississippi) in search of blues artists who're playing 'authentic' blues. He captures some memorable performances: R.L. Burnside playing on his front porch, Jessie Mae Hemphill playing in an obscure juke joint, the late Junior Kimbrough and his band playing to patrons in the bar that he owned...Bud Spires blowing blues harp accompanied by Jack Owens on the guitar, being faithful to the 'traditional' sound - that'll take you back to Robert Johnson's era....

Seems like these artists are working from a traditional Mississippi Delta blues background, but putting their own spin on it and taking the style a little bit farther on.

There's also a scene from an authentic blues 'herbalist' who explains the meaning of lines that show up repeatedly in old blues tunes like, "got my Mojo workin'" and "John the Conqueror Root" ...

And great footage of juke joints and people having a blast drinking and digging blues, especially in places like Greenville, Mississippi.