Here are some notable public figures and organizations that have endorsed Barack Obama for President:

Bill Bradley, former senator from New Jersey, and player for the New York Knicks
Common, hip-hop artist, actor
Edward Kennedy, Massachusetts senator
Caroline Kennedy, daughter of John F. Kennedy
Deval Patrick, Governor of Massachusetts
Federico Peña, Secretary of Energy under Bill Clinton
Gary Hirshberg, CEO of Stonyfield Farm Yogurt
John Kerry, four-term junior senator from Massachusetts
Janet Napolitano, Governor of Arizona
Kathleen Turner, actress
Maria Shriver, wife of California Governor Arnold Schwarzenegger
Oprah Winfrey, television host, actress
Patrick Leahy, Senator from Vermont, chairman of the Judiciary Committee
Robert DeNiro, actor
Stevie Wonder, musician
Theodore Sorensen, advisor to John F. Kennedy
Toni Morrison, author

Publications:
The Stranger, Seattle weekly newspaper
LA Times Newspaper
Newspaper Las Vegas Review-Journal