Exploring the Waste Land
http://world.std.com/~raparker/exploring/thewasteland/explore.html
A good introductory resource. Includes a full layout of the poem, with links that explain various terms and quotations.
Eliot, T. S. 1922. The Waste Land
http://www.bartleby.com/201/1.html
The full text of the poem, plus Eliot's notes.
T. S. Eliot
http://www.english.uiuc.edu/maps/poets/a_f/eliot/eliot.htm
Includes a biography and numerous articles (or excerpts thereof) on Eliot and his works.