Good black music ?
Milk Crate Breaks has oodles of obscure stuff. I'd tried to buy Gil Scott-Heron's 'Bridges' a year or three back, and it was no longer available, so it was wonderful to discover it here. Not what you'd call militant Gil, and all the better for it IMHO. The man is laid back to the point of horizontality.
(Mea culpa - you can get it as from May 2009 on Amazon UK)
UPDATE - Sgt Troy isn't too pleased with the black music he hears these days. Neither's the great John McWhorter, here on video or here in print.