One final note: According to Wikipedia, the Ellington band performed a version of Mingus' The Clown at a 1969 music festival, with Duke performing Jean Sheppard's narration. If a recording of this exists (and Wiki says it does), then the world needs to hear it.
Below the jump are some Mingus tributes.
Jacob Fred Jazz Oddysey plays Fables of Faubus:
Via the Jazz Video Guy, Billy Taylor describes his first meeting with Mingus:
Image via New York Times