Hard Choice Rated 4 out of 5 stars
Honestly I am torn between AiOS and OmniBar. I love the glass effect. Aside from that I am not seeing a whole lot of difference. Well there is the twin-pane great feature.
What Would set this appart from AiOS if you could change out the options, enable, disable and the compatability (if installed) buttons with icons allowing one to shrink it down some. Also auto-sizing the sidebar so if one is viewing the Firefox add-on default page in the side bar you can get a better view or it opens up in a browser tab. Page Info would be an added touch as well.