I'm not sure who you are incase you've been playing with us but yes, the coop night are still alive and kicking. Check the BIS forums multiplayer section for the CiA coop night thread. It contains all the info you need.
Didn't play with CiA before. Looking for good co-ops lately and saw your post on BIS forums. the original post there is more than 1 year old, is Sundays and Wednesdays are still the regular days?
[ciamemberwannabemode]Yupp, Sundays and Wednesday. Carefully read the server rules and info in the first post of the CiA thread in the BIS forums and then send a PM to any CiA member and ask him for the password.[/ciamemberwannabemode]