I was reading through some reviews and I noticed that David Pogue, of the NY Times, posted a review of why AT&T has adopted their pricing strategy, the implication of it, and more importantly what it requires. It's definitely a good read for anyone that has questions.
http://pogue.blogs.nytimes.com/2009...an-iphone-3g-s/?scp=1&sq=pogue AT&T&st=Search
http://pogue.blogs.nytimes.com/2009...an-iphone-3g-s/?scp=1&sq=pogue AT&T&st=Search