Vonage has released an updated version of its Vonage Mobile app, 1.5, for the iPhone and iPod touch, which includes Bluetooth support and a bunch of messaging features as well. Vonage Mobile allows users to make free VoIP calls to other users on the app on iOS and Android, as well as directly to landline numbers in the US, Canada, and Puerto Rico for free (up to 3,000 minutes per month.) The new update allows you to use any Bluetooth headset that works with iOS, and the messaging feature has been enhanced to allow for sharing of contacts, photos, and locations. Call quality and connectivity has been enhanced as well. You can grab Vonage Mobile for free from the App Store.