I have found a nice NFS Undercover wallpaper (http://www.ewallpapers.eu/Games/NFS-Undercover/Need-For-Speed-Undercover.html).

If you have other please share them. I can't wait for this game.

current official wallpapers.

http://www.nfsaddons.com/nfsuc/screenshots

http://www.nfsaddons.com/screenshots/undercover_wallpapers/wallpaper_1.jpg
http://www.nfsaddons.com/screenshots/undercover_wallpapers/wallpaper_2.jpg
http://www.nfsaddons.com/screenshots/undercover_wallpapers/wallpaper_3.jpg
http://www.nfsaddons.com/screenshots/undercover_wallpapers/wallpaper_4.jpg