Microsoft has recently released windows 7 RC version which you can download from this link, however there is no change the user interface of windows 7 but some of the new features added in to stream your library over the internet with windows media player.
Another new thing which comes with Windows 7 RC is the new set of some amazing wallpapers, but you don’t need to download windows 7 RC to download all the wallpapers.
Download Windows 7 RC Official Wallpapers from Flickr
Download Windows 7 RC Official Wallpapers from Deviantart
Or Download All Windows 7 RC Original Official Wallpapers In One Single Package
[ Thanks BlogsDNA ]