I'm quite intrigued as to how they will go about this, I hope they do something interesting rather than the same old standard multiplayer modes dressed up. System Shock 2 had quite a good co-op mode but most people never got to experience it because there was no proper matchmaking system or server browser, that certainly one route they could go down with BS2's multiplayer though.
BFBC2 - ROG69. GW - Ranger Rog. PSN Rog-69