USA Search has a Drupal Module
USASearch is a program of the General Services Administration’s Office of Citizen Services and Information Technology (OCSIT) which offers free search services to any federal, state, local, tribal, or territorial government agency that can be used to search one or many sites. Read more at http://searchblog.usa.gov/about-us.
Mobomo’s Adam Frazin and the U.S. Department of Commerce’s Tim Wood have officially released the USASearch Drupal module. This module is designed to take control of the default site search. It alters the default block and theme search forms and redirects the default drupal search paths (search, search/node/%) to enable your site to leverage the USASearch service.
Get it now at: http://drupal.org/project/USASearch