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One of the best articles on lighting interviews I've ever read is at http://www.videouniversity.com/articles/the-art-of-shooting-the-video-interview-a-moving-portrait/
Pay attention ot what Bill says about the background as plain white gets boring very quickly, especially of it's a long interview.
Your assumption about 3200K is correct. I always leavemy camera set to the 3200 preset for things like this as all my lights are this temp.