A couple books scheduled for release later this year.
Give My Poor Heart Ease - Voices of the Mississippi Blues by William Ferris
http://uncpress.unc.edu/browse/book_detail?title_id=1648
This will have a CD and DVD. I imagine the DVD is at least in part the 21-minute film of the same name from 1975 that is viewable online (for now) here: http://www.folkstreams.net/film,80
and
Barrelhouse Blues - Location Recording and the Early Traditions of the Blues - Paul Oliver
http://www.amazon.co.uk/Barrelhouse-Blues-Location-Recording-Traditions/dp/046500881X/ref=sr_1_1?ie=UTF8&s=books&qid=1246368593&sr=8-1
Give My Poor Heart Ease - Voices of the Mississippi Blues by William Ferris
http://uncpress.unc.edu/browse/book_detail?title_id=1648
This will have a CD and DVD. I imagine the DVD is at least in part the 21-minute film of the same name from 1975 that is viewable online (for now) here: http://www.folkstreams.net/film,80
and
Barrelhouse Blues - Location Recording and the Early Traditions of the Blues - Paul Oliver
http://www.amazon.co.uk/Barrelhouse-Blues-Location-Recording-Traditions/dp/046500881X/ref=sr_1_1?ie=UTF8&s=books&qid=1246368593&sr=8-1