Skype for iOS just recently got updated to version 3.7. The update is a minor one, as it only changes the design and fixes some bugs in the application.
The new chat interface and dialpad in the updated version of Skype look much better than the previous versions. Another thing to note is that the app runs a little bit faster but nothing significant.
Here are the changes that are listed in the App Store for Skype 3.7:
Updated chat and dialpad views
Various bug fixes
Stability improvements for iOS 5
You can download Skype 3.7 for free from the iTunes App Store.