For heaven's sake, PLEASE adopt the WebOS UI. It is easy to use and intuitive. Let the Android UI die the death it overwhelmingly deserves.
I recently went to the local Sprint store to ask whether the batteries on my wife's and my HTC Evo 4G need replacement. In passing asked the tech what things I could do to extend battery life, in particular how I could avoid leaving apps running. Here's what I was told: "If you leave an app by hitting the 'home' button, it will keep running. If you leave it with the back arrow button, it will shut down." I've been training myself to do that, and what a proctalgia it is, especially with the web browser and apps that invoke it! (Do I really have to back all the way out of the sequence of pages I've viewed, potentially reloading graphics or Flash animations?) With WebOS, it's easy--if an app has a window, it has a process. Flick the window up and off the screen, and you're telling it to shut down.