Time.com's Nerd World brings up an interesting observation regarding Halo 3.
Lev Grossman notes: "Oh, and my other question. I haven't seen it written up anywhere, and it's not on IMDB, but I'm sure I hear Billy West (of Futurama, Ren & Stimpy, etc.) as one of the Marines. Is he the David Cross of Halo 3? Was I wrong?"