In May 2008, the Pew Internet and American Life Project conducted an analysis of historical data focusing on how Americans were using and accessing Internet and mobile technologies. Pew found that Internet access (and broadband penetration) increases as income levels rise -- regardless of race and ethnicity.
In addition, Pew found the poor and affluent were highly likely to own a mobile device. For example:
For more information on Pew's research please see the presentation below.
Degrees of Access (May 2008 data)