These maybe a little too tangential:
The History Channel had a program called "Indiana Jones and the Ultimate Quest" when the last movie came out. More of a doc where archeologist and historians talk about the memes in the films as they relate to real world archeology.
IMDB listing: http://www.imdb.com/title/tt1236395/
Online version: http://www.youtube.com/watch?v=DUsmI0NLkS4
When looking for this program came across this wiki, which could yield more things: http://indianajones.wikia.com/wiki/Main_Page
Also have come across Ford interviews on youtube.
Letterman 1982: (brief mention)
Part 1: http://www.youtube.com/watch?v=0QcyX9JWMMo
Part 2: http://www.youtube.com/watch?v=9oRJzi6Mwuw&feature=related
(best part is the end. Whooooooosh!)
Karen Allen talks about Raiders: http://www.youtube.com/watch?v=T7a7kfqqwi4
CNN Interview Mark Mangini, Richard Anderson, and Stephen Hunter on Sound fx of Raiders: http://www.youtube.com/watch?v=T-A2imGs7Ls (Great behind the scenes shots and interview with production crew) Actually uploaded by Mark Mangini, 2 weeks ago - so check through his library send him an e-mail!
Another Mark Mangini interview from early 80s: http://www.youtube.com/user/markmangini#p/u/4/fwtwM0mv-QQ
Gene Shalit interviews John Williams and he talks about Spielberg and Raiders: http://www.youtube.com/watch?v=PlwqlHkF870