Powerset (natural language search)

http://searchengineland.com/080512-000100.php
http://searchengineland.com/080103-084033.php
http://www.techcrunch.com/2008/05/11/powerset-launches-showcase-for-user-search-experience/

On income inequality

and http://streetlightblog.blogspot.com/2007/05/income-inequality-international.html