No Co-op, but multiplayer will be in BioShock 2
For the benifit of those who didn't already know:
http://www.escapistmagazine.com/news/view/90328
Meh. It'll probably add nothing to the game, shooters with RPG elements never translated well online anyway. It was always an immersive single player game anyway. No rhinos or Commies either.
$ sudo make CHEEZEBURGER --mayo -off
system made you CHEEZEBURGER but ated it :(