Just listened to a fascinating, fairly balanced critique of the book The Shack: http://www.thekindlings.com/2008/09/30/the-shack-attackpodcast-live-at-hales-segment-1-of-1/. I personally enjoyed the book and leave thorough critiquing up to great minds such as these.
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I think that The Shack isn’t a good book for new believers, reasons being tha it changes the biblical view of God. This can be good for more mature Christians because it takes God out of a box!
Glad you got a chance to listen to that podcast. It certainly puts both sides of the discussion in perspective doesn’t it??