Skype for iPhone now lets you make and receive free Skype video calls on your iPhone, iPad or iPod touch, and works over both WiFi and 3G connections.
With the new app, you can:
# Make video calls to people on their computers as well as other iPhones (details below)
# Make free audio calls to anyone else on Skype
# Make great value calls to landlines and mobiles around the world
The new app is compatible with the iPhone 4, iPhone 3GS, and iPod touch 4th generation with iOS 4.0 or above. You can also receive video calls on the iPod touch 3rd generation and iPad. Calls can be made between devices using the new Skype for iPhone app and desktops including Skype for Windows 4.2 and above, Skype for Mac 2.8 and above, Skype for Linux and the ASUS videophone.
Download Skype for iPhone now from the App Store