Here are the reasons for why R2 is like it is.
1) Insomniac never planned for a single player campaign to have co-op. As such it was designed around 1 player not for 1/2 players... hopefully they will fix this for R3.
2) Only one person can sign into PSN at once because thats how SONY designed PSN... Insomniac can't change this.
In the end Resistance 3 in 2010 should be great, and hopefully by then engine improvements made while they make the next R&C game will let Insomniac add these extra features to the game...







