On May 23, 2008, 12 South American countries signed a treaty creating the South American Union of Nations. Although no formal institutions are functioning at this time, the treaty does envision a Secretariat in Quito, Ecuador (article 10) and a Parliament in Cochabamba, Bolivia (article 17). It will be interesting to see what documents are produced by this new transnational body and how it affects Mercosur and the Andean Community. The nations involved are: Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Guyana, Paraguay, Peru, Suriname, Uriguay and Venezuela. The South American Union of Nations Constitutive Treaty is available in English, Spanish, Portuguee and Dutch from the Brazilian Ministry of Foreign Realtions: http://www.mre.gov.br/portugues/imprensa/nota_detalhe3.asp?ID_RELEASE=5466
An often overlooked free source for recent U.S. treaties and other international agreements is the Department of State’s Reporting International Agreements to Congress under Case Act database: http://www.state.gov/s/l/treaty/caseact/
Selected bilateral and multilateral agreements in full-text are available from 1982 through 2008. Unfortunately, the site does not include a keyword search function. The database consists of agreements submitted to Congress by the Dept. of State as required by the Case-Zablocki Act, P.L. 92-403, 86 Stat. 619, 1 U.S.C. 112b. (1972). The agreements appear on this site before they are published in the official compilations of Treaties and Other International Acts Series (T.I.A.S.) and United States Treaties and Other International Agreements (U.S.T.).