Well this was the first online WW2 'sim' (okay, it's really not a sim!) I played:
http://www.airattack-central.com/Air_Attack_Videos.php
Then I found IL2 and never looked back.
Currently, even though I have CloD, I just don't play it as I wait for Patches.
Il2:1946 has 5 different installs on my HD (HSFX/UP/etc,etc) and I will be playing that and Wings of Prey for years yet!
I hope CloD does make it through though as it looks great, but needs patching. However, I can wait as I have loads to play with for now!
Cheers, MP