Update to Skype for iOS brings free unlimited video messaging
The iOS version of Skype requires users to be running iOS 5 or higher and offers free Skype to Skype phone calls and low cost calls to landlines or non Skype mobile devices. It might have slipped your mind, but we will remind you that in May 2011, Microsoft purchased Skype for $8.5 billion. Thankfully for those using an OS other than Windows Phone, Redmond has not been miserly with the updates.
source: SkypeforiOS via Engadget