AT&T will launch a push-to-talk, walkie-talkie style application to the iPhone for its corporate customers, according to a report. Push-to-talk has long been a feature of the Nextel network, which is shutting down this summer, and was a popular selling point for business users. This is the first time the iPhone will have the feature, though the function will require more than just downloading an app — AT&T will need to specifically enable…
