The U.S. Census Bureau said today it has launched a new online mapping tool detailing how well communities responded to the 2000 Census in an effort to raise awareness for the upcoming 2010 Census. Visitors to the new Google-based map will be able to find the 2000 Census mail participation rates for states, counties and cities, as well as smaller areas called “census tracts.” After the 2010 Census forms are mailed out in mid-March, the online map will be updated to include a tracking tool with daily updates of the 2010 Census mail participation rates.