The official Call of Duty website has been supplemented with a mini-site, and fresh images from the upcoming Call of Duty: World at War Map Pack 2 (including Japanese Zombie map Shi No Numa) are available for viewing and download.
Also available is the above image in full wallpaper sizes.
So far, however, the placeholder space for Shi No Numa in-game screenshots remains blank; Treyarch is keeping mum about their surprise hit co-op mode addition, and with less than a month before release. Instead, there is a description that confirms that ten Trophies and Achievements will be available exclusively in Shi No Numa.
Map Pack 2 will be available sometime in June.
Source: Callofduty.com