The University of North Texas continues to upload fascinating Ellingtonian material from the Willis Conover Voice of America Archive.
Firstly, an interview with Johnny Hodges was uploaded (which may be heard here).
Now, there is a two part interview with Ellington himself.
Part One is here.
Part Two may be heard here.
The entire Ellington-related list of contents (most of which accessible only to the UNT community, unfortunately)is here.