Will the Cingular/AT&T Wireless merger mean higher prices?

We've definitely encountered two schools of thought about whether or not Cingular's acquisition of AT&T Wireless is going to lead to higher or lower prices for cellular subscribers. It certainly seems intuitive that fewer competitors means higher prices, and that's what a recent report from The Phoenix Center (who we've never heard of before) is predicting, there is an argument to be made that a more powerful Cingular will be better able to take on reigning heavyweight Verizon Wireless, and force them into a price war.