Check this visual style for Windows 7.

Much has been polished and much had to be redone, thus some things have been changed -- some compromises here as Windows 7 shares even more resources between different parts of the theme. So expect some details to be lost (like the etched look on the group sorting headers -- Windows 7 ignores the property and only allows a 1px height for the seperator), or the unique "New Application" button state for the Start Menu (that image is shared and grossly distorted in another area), amongst other things.

Clearscreen Sharp for Windows7 by *K-Johnson on deviantART

Clearscreen styles for Vista are here K-Johnson's Gallery