Pam:
I know both Todd Boyd and Jane Gaines are working on this topic,
although I don't know what they've published. I'd look for their
recent work.
Also, Manthia Diawara has a new book on Black American Cinema
that should be a good reference.
Good luck!
Sarah Projansky
Middlebury College
Middlebury, VT 05753
(802) 388-3711