Toktumi, developer of the popular Line2 VoIP communications app for the iPhone and iPod touch has released a native iPad version of its app. Line2 HD brings voice calling and text messaging to the iPad over either a Wi-Fi or 3G data connection. Users can place and receive calls using the built-in speakerphone or connect a wired headset of Bluetooth device. As with the iPhone version users sign up for a Line2 account and are assigned their own phone…