I'm glad they finally have this game sorted out. It was supposed to come out on the current (last?) generation of consoles.
I guess I had better finish the first game then!
Looks fun! I'm glad to see you guys are as chaotic as we are ;)
I may have found my own answer. According to the Steam forums it is only co-op challenge modes online. The story mode is only co-op offline. For however much you want to believe in the reliability of forum posts anyway.
Is there online co-op campaign? Or only online co-op modes?