Bellow is an image of the 4 Windows Live desktop application's navigation bars. All have a different look and fell.
Black/dark blue text. Sliver looking. Hover over has slight 3D felling. When pressed you get a darker, shadow like visual.
More flatter look, hover over is flat, When pressed you get same effect as the mail.
same look as mail. When pressed you get the actual "press" look and fell, rather a faded shadow look.
My favorite, very clean. hover over is crisp and shinny. SHOULD be like this for the rest. Hover over had faded look,
Just wanted point this out. I dont want anyone screaming "this is not a windows live site" or "doesnt relate to windows 7", as if you look you'll see there IS windows live posts here.