I'd like for there to be an enhancement to SimpleTap where you can easily navigate between open windows. I found that when you have the X220T in tablet mode with the screen orientation in such a way that the Task Bar/Start Menu is aligned with the side of the tablet that has the Pen its kind of hard to toggle between programs using the taskbar. This is because with the wireless bar, simpletap button and other icons it leaves room for about 2 program icons.
I was thinking that this should be an option that takes up an entire simpletap screen itself(like the question mark or hash tag). Perhaps this can be tied into Windows Aero functionality where screen shots are already taken and probably cached somewhere for open windows.