Academy of American Poets
Poets.org: Langston Hughes
This site provides a biography of Langston Hughes, followed by several of his poems (some complete with audio clips) and a bibliography of his more influential works.
Other
The Dream Flag Project
This creative and collaborative project is centered around the poetry of Langston Hughes, and incorporates art, multi-cultural ideas, and student performance. The site is full of examples, information, lessons and explanation.