This could hurt blackberry and Iphone subscribers...

AT&T shifts away from unlimited data plans. AT&T (T) announced yesterday that it will no longer sell unlimited internet data plans to new customers with smartphones and iPads (AAPL), opting instead for usage-based pricing that charges heavy bandwidth users more. Analysts said the move will bring some much-needed common sense to the wireless industry, and likely marks the beginning of the end for unlimited data plans.