“By blocking FaceTime for many of its customers, AT&T is violating the FCC’s Open Internet rules,” Bergmayer said in a statement. “These rules state that mobile providers shall not ‘block applications that compete with the provider’s voice or video telephony services.’ Although carriers are permitted to engage in ‘reasonable network management,’ there is no technical reason why one data plan should be able to access FaceTime, and another not.”

via AT&T won’t charge for FaceTime over 3G, but will require shared data (Updated) | Ars Technica.