Congress.gov to Replace THOMAS
Congress.gov is a beta site by the Library of Congress that contains U.S. legislative information. It will eventually replace THOMAS.gov.
At this point, the beta Congress.gov contains legislation from the 107th Congress (2001) to the present, member profiles from the 93rd Congress (1973) to the present, and some member profiles from the 80th through the 92nd Congresses (1947 to 1972).
For more information, see the comparison of coverage currently available via Congress.gov and THOMAS.gov.