Why multi-task? My brain can do only one job... If I want to switch an application, I close the current and open the new one. Same when I go back to the former one. It's fast enough to get the "multi-task" feeling and the latest status is always saved.
Additionally, the iPod is always available in the background.

I don't miss anything like multi-tasking. But this is individual preference, I admit
-SmartMic