Thanks for making this plugin :D
I'm a web designer and i don't like menus on the left! very simple reason:
1. most of human are right handed!
2. I agree.. all web browsers has the scrollbar at right side! so why you have to strecthed the viewer?? people want a fast browse!!!
maybe in future, WP has to put this plugin as default functional too, or change it from left to right with no compromise!