Have you ever heard of Larry Smith?
He is a dynamic speaker and a professor at the University of Waterloo specializing in Macro-Economics.
I can’t stress enough that he is an amazing speaker and would be a great guest on your show.

Larry Smith profile: http://economics.uwaterloo.ca/fac-Smith.html
Random Lecture: http://video.google.com/videoplay?docid=-48595345...

Cheers!
CK