Check out this AMAZING trailer and 5 minutes of FIRST gameplay from the upcoming Call of Duty: World at War Custom Zombies Map "Malibu Drive: Age of Apocalypse"! This map is going to evolve the Custom Zombies scene yet again, in my opinion! This map is scheduled to be released near early September.
Keep in mind some of the video footage is low quality since it was ripped from a 720p livestream. You'll get the REAL thing when the map releases though. :)