As our very own Sebastien correctly predicted, Sprint has announced that it is discontinuing its unlimited data plan. The only catch is that smartphones, including the iPhone, will still be able to take advantage of an all-you-can-eat data plan on Sprint's network.
Sprint will begin imposing data caps on each customer's next bill cycle, but iPhone users won't be affected by the policy change. This move indicates that Sprint doesn't plan on keeping its unlimited plan around in any form for very long.