Addressing one of the major missing functions of the iPhone 3G in its region, Japanese iPhone carrier SoftBank has announced (Translated Link) a new combination 1seg receiver and battery pack for the iPhone 3G. According to the company’s announcement, the new accessory will use Wi-Fi to transmit video to a special application to be released on the App Store, allowing users to watch 1seg broadcasts on their iPhones. SoftBank claims the user can…