The iPhone 5 and its release date are expected to be revealed at a special event in San Francisco on September 12, as a recent invitation hints. This week, Apple sent out a special invitation to media outlets, stating that there will be a special event held at the Yerba Buena Center for the Arts in San Francisco. Now reporters and technology fans are making travel plans to the California city to attend the event in which it is believed the new iPhone will be revealed. San Francisco hotels are already feeling the effects.