Once again, Windows 7 build has been leaked. Paul of Jcxp has extracted and posted the wallpapers and sound schemes. You can download them from the below links.
Wallpapers
Sound Schemes
Sample Pictures
Display Pictures
Note: I couldn't find any changes in sound schemes and sample pictures.
via IntoWindows: Windows7 build 7068 wallpapers
Thanks to Jcxp & geeksmack