Dan, there is this group:
http://www.866ourvote.org/
>Through our state of the art hotlines: 1-866-OUR-VOTE (administered by the Lawyers' Committee for Civil Rights Under Law) and 1-888-Ve-Y-Vota (administered by the National Association of Latino Elected and Appointed Officials Education Fund), this website, and comprehensive voter protection field programs across the country, we provide Americans from coast to coast with comprehensive voter information and advice on how they can make sure their vote is counted. Made up of more than 100 local, state and national partners, this year's coalition will be the largest voter protection and education effort in the nation's history.