At what website may I find the words to "On the Pulse of Morning," the
speech given at President Clinton's inauguration?

The text of Maya Angelou's "On the Pulse of Morning" (also known as
"The Inaugural Poem" and as "The Rock Cries Out to Us Today") is
available here:

State University of New York, Fredonia
http://www.fredonia.edu/aaoffice/angelou.htm

Two alternate sources:

The Glass Ceiling
http://www.theglassceiling.com/looking2/lo16_ina.htm

University at Buffalo
http://www.math.buffalo.edu/%7Esww/angelou/poems-ma.html#rock

If you'd like to hear Dr. Angelou reading her poem, there is an audio
file here which includes the last two stanzas:

Ibiblio: The Women's Resource Project
http://www.ibiblio.org/cheryb/women/mangelou.au

Google search strategy:

Google Web Search: "on the pulse of morning" + "angelou"
://www.google.com/search?hl=en&ie=UTF-8&oe=UTF-8&q=%22On+the+Pulse+of+Morning%22+angelou

I hope this information is useful. If anything is unclear, or if a
link does not function, please request clarification; I'll be glad to
offer further assistance before you rate my answer.

Best wishes,
pinkfreud