My friend Angela Walton-Raji has been creating podcasts for those doing African American research. She has a group devoted to it on GenealogyWise (http://www.genealogywise.com/), the social networking site for genealogists.
Check out the group on GenealogyWise at: http://www.genealogywise.com/group/africanrootspodcast . Both the group and the podcast are devoted to African American genealogy, news, events and resources.
I met Angela several years ago when she came to Oklahoma to help with the clean up of Old Agency Cemetery.