The official Skype apps for iPhone and iPad both received updates today to version 4.0, adding a new video preview feature, as well as adding a plethora of stability improvements, bug fixes, and design enhancements.
What’s New in Version 4.0
-New feature: ability to move own video preview
-App auto restarts if unexpectedly shutdown
-Improved accessibility
-Improved stability
-New sign in screen
-Other minor UI improvements
-Bug fixes
Skype for iPhone and iPad are both available for free through the App Store (link).