The official Skype app for the iPad has been updated to utilize the new iPad Retina display capabilities. According to the “Skype Garage” blog, the Skype v3.8 release features just this small cosmetic update.
This updated version requires iOS 4 and up, although the developer’s release notes recommend using the iOS 5+ to enjoy the best Skype experience.
For those who still haven’t downloaded the Skype app, it is currently available for free from the Apple’s App Store.
Via: Skype Blog’s page