Skype 3.0

butterscotch says:

Make completely free calls to people on Skype over Wi-Fi or 3G! With version 2.0.1, calls can be received even while other applications are running!

the author of this app says:

With Skype on your iPhone, iPod touch or iPad, you can make and receive calls, and instant message anyone else on Skype, wherever they are in the world. You can also save on international calls and text messages to phones. Skype is free to download and easy to use. With the latest version, you can now call over 3G*, and keep Skype running in the background.

Call Skype-to-Skype, wherever you are

Call your Skype contacts wherever you may be, either on 3G or WiFi, with near CD quality sound. It's completely free to call people on Skype over WiFi or 3G*.

Great value international calls and text messages

If your contacts abroad aren't on Skype, you can still reach them and save with Skype's great rates. Call and text phones anywhere in the world directly from your phonebook.

Instant message for an instant response

With Skype for iPhone, you can instant message one or many people on Skype at the same time, wherever, and whenever the mood strikes.

*Operator data charges may apply

- This version works on iPhone, iPhone 3G, iPhone 3GS, iPhone 4, iPad and iPod touch. Skype requires iPhone OS version 3.0 or above.
- Calling functionality is available on iPhone, iPhone 3G, iPhone 3GS, iPhone 4, iPad and 2nd generation iPod touch onwards. iPod touch requires a compatible headset with a microphone.
- Near CD quality sound for Skype-to-Skype calls using wideband audio (SILK codec) on iPhone 4, iPhone 3GS, iPad and 2nd & 3rd generation iPod touch.

What's New in version 3.0

Improvements:
• Make Skype to Skype video calls on WiFi and 3G*
• Call Skype desktop users (Mac OS X or Windows) and other iPhone users.
• Two-way video calls supported on iPhone 4, iPhone 3GS and iPod touch 4th gen.
• Receive only video supported on iPad and iPod touch 3rd gen, with no camera.
• Make video calls in portrait and landscape.
• Skype video calling requires iOS 4.0 or above.
*Additional Data charges may apply