This episode of the radio program in the UK called Unbelievable with Justin Brierley is a discussion between James White and Brian McLaren on the Emerging Church and postmodernism. It aired in 2011 and I just now got around to listening to it. Good stuff. They both outline their positions very clearly and respectfully. Worth the listen:

http://media.premier.org.uk/unbelievable/7684e862-dcf2-4bd2-a1f3-aceb16f2f17c.mp3 (MP3)