Windows 7 Beta is out for public and has been installed by millions of people. Microsoft has released a bundled of goodies for Windows 7 such as Themes, Gadgets and Wallpapers for Free. You can enhance and customize your Windows 7 experience by using these goodies.
There are lots of great Themes, Desktop Background (Wallpapers), and Desktop gadgets available for download.
Download Page: http://windows.microsoft.com/en-US/windows/downloads/personalize [via]