I moved to Android solely because Sprint and then HP itself had thrown webOS under the bus, but every day I wish I had the webOS UI. With webOS it's obvious which apps are running: it's running iff it has a window, and flicking the window upward is guaranteed to stop the app. Under Android, there may or may not be a way to explicitly stop an app, and if there's a way to find out which are running, I haven't found it yet. Yes, ideally I shouldn't have to worry about it, but with finite resources (including battery as well as RAM) I do, and with Android I'm in the dark.