Your taskbar/menubar will remain transparent until you hover over it with your mouse, at which point it smoothly fades back to opacity. Aside from cleaning up the workspace, these apps also (to an extent) expand your viewable workspace. If you're someone who lets your taskbar/menubar distract you come work time, one of these programs could be perfect for you. AlphaXP Lite also does windows transparency duties if you're into that sort of thing. Both apps are freeware, both apps are cool.