yeah i already did that mission where you get the armored truck with all the extra armor put on it then drive it back to the lifeguard tower. i'm on act 6 i think, 34% done with the story line. i just saw one of the hints on the loading screen said you can exchange stuff between players when you hop in and out of their game. but i havent seen anyone online in my friends list playing this game so i havent even tried the co-op yet