For your audience that is concerned with health disparities, the August 5 issue of the New England Journal of Medicine has an article and an editorial of possible interest:

Bach, Peter B., Pham, Hoangmai H., Schrag, Deborah, Tate, Ramsey C., Hargraves, J. LeePrimary Care Physicians Who Treat Blacks and WhitesN Engl J Med 2004 351: 575-584
http://content.nejm.org/cgi/content/abstract/351/6/575

Epstein, Arnold M.Health Care in America -- Still Too Separate, Not Yet Equal
N Engl J Med 2004 351: 603-605
http://content.nejm.org/cgi/content/full/351/6/603