In the aftermath of a bruising advertising battle with Verizon Wireless that highlighted the limitations of AT&T's 3G network, an AT&T executive told investors that high-bandwidth iPhone users could face higher usage charges. Ralph de la Vega, AT&T's head of consumer services, told investors at a UBS conference in New York that people who consume a large amount of data would receive incentives to "reduce or modify their usage," the Associated Press reported.
Although this probably makes sense from business point of view - so they can invest mode in network or discourage users from over utilizing bandwidth over business users particularly at peak hours - it really doesn't make much sense from technology point of view.
My company develops applications for iPhone and mobile platform. After all, iPhone and mobile apps are becoming less of a lifestyle and more of a productivity tools. And, move such as this from a provider could probably move some serious users away. I hope this doesn't move from AT&T doesn't last long and they work on providing more coverage, bandwidth and redundancy through their network.