Black Ops II Zombie Mode updates

Call of Duty Black Ops Blog has new info on the upcoming Zombie maps and game modes. The most interesting part is the new Grief Mode:

Grief is the competitive part of Black Ops 2 Zombies. Up to eight players are devided into teams and dropped into one of the above Zombies maps which is, of course, filled with zombies. The last team standing wins, but players can not directly shoot each other.

"Players can not directly shoot each other..."

Sounds interesting... very interesting...