Lack of multi-tasking breaks iPhone user experience

Lack of multi-tasking breaks iPhone user experience. Take App Store application on the iPhone for example. When user taps on Install button, App Store application is closed. When you go back to the App Store, you are at the beginning of a huge application list. It should at least store your last position in the list. Another example might be online radio applications. I enjoy listening online radios. But when I need to use another application, I must quit.