So I've installed 4.0. So far ok. I miss my dedicated iPhone controls invoked by the home button, and the new iPod icons down there look very 2001, but whatever. What I don't really get is the subdock. (ooh...subdock...did I just coin a new word?) I realize the apps aren't running. I realize they're just hanging out. But why does the OS keep adding more icons? Is it supposed to be some sort of shortcut bar? How/why am I supposed to interact with the subdock icons in a way that's any different or more meaningful than interacting with the icons on the home screen? What's the point of being able to X out an app from the subdock if the app isn't running anyway? If I want to listen to Pandora and surf Safari and the OS supports that, why does it matter to me if I can interact with the app's icon(s)? Am I supposed to be cleaning house in the subdock and X-ing off apps I'm no longer using? It's a bit vague. If it's a metaphor for a task manager, it's a pretty dumb one. A task manager shows you every currently running app, not some ever expanding list of zombie apps that aren't running. The subdock feels more like a browser history than anything else. As of right now, I have 15 icons sitting in the subdock and I have no idea why they're there or what to do with them, or if they'll go away eventually. I sure as heck have no interest in manually tapping closed 15 apps for no reason.