There might have been economic barriers, but they seem to be falling.

"Ethnically, 67 percent of whites reported home broadband; English-speaking Hispanics reported 66 percent; and blacks reported 56 percent."

http://www.pcmag.com/article2/0,2817,2367687,00.asp

African Americans use the mobile internet more than whites.

http://www.blackweb20.com/2010/09/23/pew-report-african-amer...

So it looks like to resolve this issue, all we need to do is let current trends continue.