It shouldn't be too hard to do the old "over the shoulder" camera view with your self as the "shoulder" as well as the interviewee right? I may have to try this. A simple overly/composite with a basic, feathered mask. Even a little blur to suggest DOF for the shoulder in the extreme background.
Anyone done this before and maybe have a link to a sample of how it turned out?

Do you mean you'll overlay the shoulder in post? nice idea, I hadn't thought of that...

Um, I think you also mean extreme *foreground* for the shoulder? :-)