I used to use VTL Launcher which was fantastic. It allowed 3 scrollable docks (bottom + 2 sides) and you could just drap app icons onto it. I used the 2 side ones and it was so easy to launch any app with my thumbs.
Now I moved to ICS on my tablet. I can't find anything like VTL (it doesn't run on ICS). I tried all the launchers. Go has a dock on the right, but there is a big gap between icons and you can't drag and drop shortcuts.
Since the ICS launcher is good, I really prefer just a widget. I tried Launch-X which lets you scroll vertically only. It provides only horizontally oriented widgets though. Close....but hoping to do a little better.