Jared Ball on Marable's Malcolm X bio which he did not live to see published.
And down a few posts here, Marable's lecture Living Black History. There are two other lectures on the original site.
Michael Eric Dyson: Manning Marable, A Brother, A Mentor, A Great Mind
The Great Wells of Democracy and others at googlebooks, including Beyond Black and White with the celebrated and enduringly important reply to Adolph Reed's essay The Current Crisis of the Black Intellectual.