Not an outright endorsement, but controversial Nation of Islam head Louis Farrakhan just heaped lavish praise upon Barack Obama while addressing a crowd of about 20,000.  Most of his two hour speech focused on Barack Obama:

"This young man is the hope of the entire world that America will change and be made better," he said. "This young man is capturing audiences of black and brown and red and yellow. If you look at Barack Obama's audiences and look at the effect of his words, those people are being transformed."