Well Sony just announced that Killzone 3 will be having a multiplayer beta and it starts sooner than you might think, October 25th. The closed beta will be for Playstation Plus subscribers and entry will be limited to 10,000 of the service.
In the beta gamers will get a taste of the Operations Game Type, Party System, Jetpack, and other vehicles.
To be considered for the beta you need to download am XMB theme from the Playstation Plus part of the Playstation Store by October 14th. Hopefully just hopefully we get in because we have such a shortage of FPS games to play right now, I think a beta for Killzone 3 is just what we need.