USA.gov
The official U.S. Government Web portal -- the gateway to tens of millions of Web pages from hundreds of government agencies -- has a new name: USA.gov.
Interestingly, one of the reasons they changed the name is that they found that searchers had tried (vainly) the search term "usa.gov" over 600,000 times in one year. (Using that logic, maybe they should have changed the title to "paris hilton.")
Links are maintained in several locations in the library Web site, including here.