From Library Journal:
“Developed by the U.S. Department of Energy’s Office of Scientific and Technical Information, this ‘Global Science Gateway’ allows one to search across 28 scientific databases from 18 countries. An international collaboration, the site provides access to published research findings in energy, medicine, agriculture, environment, and the basic sciences.” Simply type your query into the search blank to access information from all 28 databases.
Update: The database has expanded to include 32 national databases and access to portals in 44 countries. [6/16/08]
Update: “Now you can find non-English scientific literature from databases in China, Russia, France, and several Latin American countries and have your search results translated into one of nine languages.” [7/8/10]