African Studies at the Columbia University Libraries
A great portal to sites on the African Diaspora and American slavery, including links to PBS documentaries, the Library of Congress, UNC Chapel Hill, and so forth.

The Black Past: Remembered and Reclaimed
The site includes an online encyclopedia of hundreds of figures in African America, full text primary documents and major speeches of black activists and leaders from the 18th Century to the present. Also included are links to several websites that address the history of African Americans including major black museums and archival research centers in the United States and Canad