have you seen the video on how easy it is to multitask in Android 4.0 ICS? lower left button is back. center is home and right is recent apps list aka multitask button. it is like in honeycomb that has the thumbnail views of the recent apps. but you can swipe the running apps left or right to kill the app. the view is like the single column task switcher but with the webos functionality of swiping to kill apps.