Google Vertical Government Search

is similar to the five-year-old FirstGov.gov, the government-sponsored site powered by MSN, intended to help citizens locate federal, state and local government information. More than 87 million unique visitors used Google's search engine in May, compared with 443,000 that searched FirstGov, according to Nielsen/NetRatings.

Google has launched several vertical search engines, more recent among them sites that search the contents of scholarly journals, books and blogs.

http://www.google.com/ig/usgov