That being said, scrims can be performed, even though it is not as simple as joining a server (because there is no GODDAMN TEAM CHANGE OPTION!).
My clan are called 1Day, website here: http://1day.enjin.com/. Please send me your steam addy or challenge us on our forums if you are a member of an Australian clan who is willing to scrim.
Atm we are testing out crash site, as it seems to be the only scrimmable mode, It looks like ASSAULT was designed for scrimming but the mode is an absolute joke and 4 v 4? Come on.
Until we are able to set up servers properly scrim rules cannot be written, so far the only rules going around are no killstreaks are allowed and the map 'island' is not to be voted for.
these early weeks are when you see clans emerge and develop for a game but I am afraid Crysis 2's bad server options, friends options will be deterring many CoD clans we know and old Crysis Wars clans have given up on the game because you can't run a proper scrim server or host private matches.
So anyone willing to give some scrims a go, get in contact with me or my members. Cheers