Interestingly, Android may have the same limitation...
See : http://www.intomobile.com/2007/11/12/did-anyone-notice-that-android-doesnt-support-multitasking.html
But then writing about Android isn't going to be capturing hits in the same way the iPhone does...
Quite.
The video referenced by that article (), from the Android team, explains the state-save model very well. Same model for iPhone 3rd party apps if I've understood it correctly.