The Skype iPhone app has finally been updated to include support for iOS 4’s multitasking functionality, essentially allowing you to receive Skype calls and chats when the app isn’t running in the foreground. This comes after an update in May that brought support for 3G voice calling.
“Run Skype in the background with multitasking in iOS4. Receive Skype calls and IM while other apps are running or when your iPhone is locked. You can also continue your call while you switch to another application. Multitasking is available only with iPhone 4 and iPhone 3GS.”
You can grab Skype for iPhone, iPod touch, and iPad here. Requires iOS 3.0 or later.