A couple of days ago, the latest iphone question was battery capacity. Today, people are wondering about the iPhone's as yet unannounced data plan and how much it will cost, which becomes a big question when you think about all of the cool things the iPhone can do that require outside data. Pontificating on that very theme, Gizmodo has a novel solution: unlimited usage for a flat, monthly fee. Apple, with its history of innovation, would be a logical catalyst for such a sweeping change in the mobile industry and it could very well start a revolution in the way we pay for our cell phone plans, much like VoIP has done for land lines. The major roadblock, as Gizmodo points out, is that cell phone companies would be resistant to change; they make a lot of money on the incremental charges we all rack up every month. However, it seems like setting a high enough price for this flat fee plan would more than make up for the difference.