its working fine online/multiplayer/zombies using neogamma & game burned on DVD-r, 249v20 base 57.
heres some stuff i found that made it not work...
using the exact same stuff listed above, except using GX to boot the DVD-r made it blackscreen when trying to use multiplayer. i believe this is because the game doesnt like to be patched ( same issue as PoP )
even when the game booted correctly using the system menu, i had issues connecting to online. i had to create a second profile and magically it connected and played fine online. i tried this on 2 different wiis. my game would not connect to online ( just hung there trying to connect ). as soon as i created a second profile, it connects imediately