Well, I'm a member of Shellshocked: A TMNT Podcast, and we've done a few interviews you might like:
http://forums.thetechnodrome.com/showthread.php?t=40259
We opened up with Kevin Eastman in Episode 1, David Wise in Episode 5, Ciro Nieli in Episode 6, Kevin Munroe in Episode 8, and Bobby Curnow in Episode 9.
Hope that's not too much of a shameless plug, but you wanted interviews, and we had a few, lol.