Academy of American Poets
Poets.org: Stevie Smith
The biography is brief but covers the poet's life and themes. What makes the site valuable is its links to other Smith sites, including one RealAudio site that features the reading of her poem "Not Waving but Drowning."
Other
Rice University: The Jungle Husband
Smith's poetry's "irreverence and whimsy" are evident here. A brief comment follows it.