Killzone2 is good for its gameplay because u can change the games you want to play and has good scrim capabilities.
Their clans are revolutionary for the ps3 system and u can control them from the website
Aye killzone2 is a knockout of a game, great development work in most aspects of the game. Game developers are starting to catch on to the fact that if a game has a good offline mode and great online mode it's going to put money in there pockets!
I absolutely agree with you and the better multiplayer like clans and guilds (guilds usually in mmorpgs)
A magazine in sweden just claimed that this was the best graphics for the PS3 right now... was it correct?