Good suggestions; however I found a combination of that one, along with a free GO Launcher ICS theme looks more authentic. I also used the ICS Phase Beam Live Wallpaper instead; there is also a better GO Locker theme which allows you to access messages, phone, camera, and home screen from the lock screen and a few other perks.
The GO Email widget can also be used to mimic ICS's ability to have a GMail scrollable widget so I'd suggest getting that too.
BTW you should customize your status bar with blue icons like ICS to complete the effect