I have the Cairo dock installed and I love it. When I mouseover the icons, they enlarge, gain focus, etc. Is there a way to make the icons on the Unity sidebar behave in that same manner? I have installed Ubuntu Tweak, Unity Tweak, and even Compiz. Between those applications, I would think I could achieve my goal but I can't. Is there a setting somewhere I am missing? Any help would be greatly appreciated.
Unfortunately, due to the way Unity's launcher (which is not a dock according to Canonical) works, you can't do this.
You can however create a setup where Cairo Dock is aligned to the left of your screen as the launcher would be (as a compromise).