The official web site of the Nobel foundation,
http://www.nobel.se/literature/laureates/1993
the foundation that awarded Morrison in 1993. This page offers a transcript of Toni Morrison's Laureate Lecture as well as a list of links to a few sites that are dedicated to the literary analysis of her works. The updated bibliography on this site is among the most extensive, including Morrison's fictional prose, dramatic works and several volumes of literary and social criticism. (The Nobel Foundation also happens to have reproductions of the Swedish postage stamps that were issued, as is the custom, following Morrison's award.)
Easily, the most comprehensive of the Toni Morrison web sites,
http://www.luminarium.org/contemporary/tonimorrison/toni.htm
"Anniina's Toni Morrison Page" has individual sections devoted to biographies, bibliographies, interviews and a bookstore. More important than that, this web site also has separate sections for each of Morrison's seven novels. The Jazz section lists four essays and articles, but only three of the links work. The "miscellaneous" section is valuable for its "chronology," listing all of the novel's convolutions in an ordered timeline that starts with True Belle.