LittleSis

LittleSis is, according to its website, "an involuntary facebook of powerful Americans, collaboratively edited and maintained by people like you." 

"LittleSis is a project of Public Accountability Initiative, a nonprofit nonpartisan research and educational organization focused on government and corporate accountability." Kevin Connor and Matthew Skomarovsky are co-directors of PAI. 

LittleSis is funded in part by the Sunlight Foundation. 

Website

 * http://littlesis.org
 * Website's blog: http://blog.littlesis.org/