According to sources, Microsoft is developing a voice activated iPhone application. The application, Tellme, is designed to offer voice activated search. Tellme is already available on a variety of other smart phones including RIMM's Blackberry. The application faces one issue in that Apple does not have button for the application to use for push-to-talk. It is expected the software to include a large virtual push to talk button. The application is not expected to be released until early next year.