Use EUbusiness to find information from and about the European Union as well as countries in Europe. (Registration required)
An extensive collection of links for business, economics and law resources related to Russia and Eastern Europe is REESweb - Russian and East European Studies Internet Resources
For information on Latin America, a good starting point is Business in Latin America from the Latin American Network Information Center. Another good resource is Latin American Economic Outlook from the OECD, with an overview of the region and profiles of selected countries.
The Secretariats or homepages of the various regional economic or trade communities are:
Many scholarly articles and research reports on these trade communities may be found with CIAO: Columbia International Affairs Online. (Rutgers-restricted Access)