Guerrilla Games is set to release patch version 1.07 for Killzone 3 tomorrow. The "Preliminary Patch Details" were released on the official Killzone forums.
What is so fascinating about this patch is that it will introduce custom games to Killzone 3. However, all the details currently aren't announced as this is "subject to change". Other notable mentions are fixes in map exploits, crashes when joining warzone games and a few menu bugs and enhancemetns.
Source: Killzone Blog