Congress.gov, currently in its beta version, is the new portal bringing you the United States Legislative Information.

[It] 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).

According to Congress.gov, the plan is

to transform the Library of Congress’s existing congressional information system into a modern, durable and user-friendly resource.

The goal for this site is to eventually contain all of the information currently available on THOMAS.gov. Users are welcome to visit Coverage Dates for Legislative Information to see a comparison of the scope of legislative information on THOMAS.gov v. Congress.gov.

From the first looks of it, Congress.gov features modern and more intuitive interface. Users can search by a Bill Number, Public Law Number, or by a keyword. Currently, the search box recognizes a phrase while search operators will be added in the future. Results can be further filtered by Congress, Legislative Source, Chamber of Congress, Legislative Type, Subject of Legislation, Statues of Current Legislation, committee, Sponsor, Cosponsor, or a Political Party, allowing users to exercise a better control over the results.  For more information about search options, see the Search Tips Overview.

Users are invited to take advantage of the number of education tools, including up to date videos explaining the legislative process.  The site conveniently presents all related documentation for each bill (or other document) directly from the page of that bill (or that document). Users can subscribe to receive updates via RSS feed and information can be easily shared via number of social media platforms through ShareThis.

Last, but not least, the Library of Congress invites you to    which is linked from every page.