I know that there's no definite answer, and Siri is still in beta, but does anybody see this feature in the near future? iOS 3 and 4 had it to some degree with Voice Control. I asked Siri to call my friend earlier, and it was unable to connect to the network, so it didn't work. It would have worked on iOS 3 and 4, though. Do you think this is a priority for Apple?