Sorry to tell you, but it wont be an Update of the Multiplayer Crack.
The Fix of KeyCheck is ServerSided.
We cant hack theyre Database to bypass the check.
(We can Sqli/Lfi and so on but its illegal ;D)
It Worked most Time but its Over.
Maybe there will be an Developer, wich will make an LanCrack like AlterIWnet.
But till this happens, you can wait , and wait, and wait again.
EDIT:
Hell wait...
Maybe there would be a way....
I would need an Guy wich Know much about c++ and winsocks.
And we would need an Guy wich have an Original key to test something..
Then MAYBE it would be possible even if there is an patch 9.999
But... dont know until test