Some basic rules:
Yes, Throw aways are allowed.
No, don't make Joke PCs
Yes, you can kill each other even if you aren't the murderer.
No, do not buy any potions/supplies for this event. You won't start with any potions, and the best armor you'll have is leathers. You need to scavenge proper armor.
Yes, you can keep playing the PC if you survive (infact, you'll be encouraged to as this will introduce a very dark plot for the server).
The theme of the prelude is zombie survival. You aren't meant to win against the hordes, so think outside the box, I will try and facilitate as much as I can via rolls and whatnot. There will be uses for rogue skills and more.