AT&T Introducing Limited Data Plan?

Reports from BusinessWeek says that AT&T may be considering introducing a limited data plan for the iPhone at $20 a month. With their current unlimited data plan at $30 a month, users that don't use as much data could save a bunch of cash switching to the limited data plan in the long run. Unfortunately, the data transfer cap for the limited data plan has yet to be revealed.

The report also states that AT&T may be considering dropping the price of iPhones to $99 from the current $199. A prepaid iPhone is also rumored to be under consideration.