More websites coming soon (send me the URL if you have a suggestion) ...

Latin American Network Information Centre, University of Texas—includes lots of maps and links to historical and other sites: http://lanic.utexas.edu/la/region/map/index.html

Sources and General Resources on Latin America: includes some Caribbean links, including maps: http://www.oberlin.edu/~svolk/latinam.htm.

Try typing the name of the country you are researching into a search engine, for instance http://www.altavista.com. (You will find a lot of tourist sites, but some have historical information as well!)

http://www.britannica.com: a thorough reference collection including Encyclopaedia Britannica.

Digital Schomburg African American Women Writers of the Nineteenth Century (New York Public Library), includes several slave narratives, including Mary Prince, from Bermuda:  http://digilib.nypl.org/dynaweb/digs/@Generic__CollectionView;hf=0

University of North Carolina at Chapel Hill Documenting the American South Project: http://www.ibiblio.org/docsouth/ includes a collection of slave narratives, mostly from the US, but some from elsewhere, including James Williams, from Jamaica.

Studies in the World History of Slavery, Abolition, and Emancipation: an online journal with some interesting articles and lots of links: http://www2.h-net.msu.edu/~slavery/

Internet History Source Books, based at Fordham University: probably the web's biggest collection of primary documents,  includes a substantial collection on US slavery, and a few on the British colonies: in particular try the African History Sourcebook's sections on The Impact of Slavery: http://www.fordham.edu/halsall/africa/africasbook.html.