If you are trying to make the game let you play online without the update, it will now work. If you try to connect to someone with the update it will give the error "Your playlist data is different than the host's."
"Doing some late night headhunting on PSN and Xbox Live. Taking down gamertags / PSN IDs exploiting the COD 4 UFO hack. (via @fourzerotwo)" - IW. Exploiting a hack? lolwot