http://blog.us.playstation.com/2010/10/07/killzone-3-beta-starts-on-october-25th-here%E2%80%99s-your-chance-to-get-in/
Yes, the Killzone 3 Public Beta Trial really is coming! Just like its predecessor, the multiplayer mode for Killzone 3 will be put through rigorous testing at the hands of the toughest, most demanding critics in existence: you, the fans. The Trial starts on October 25th and access is limited, so please read the following instructions carefully if you want to know how to secure a spot in the Public Beta:
- Be(come) a Plus subscriber
- With the exception of a handful of key media partners and selected PAX feedback participants, access to the Killzone 3 Public Beta Trial is limited to PlayStation Plus subscribers. If you’re not enjoying the many benefits of Plus membership yet, now’s the time to sign up!
- Download the theme
- On October 19th, an exclusive Killzone 3 XMB Theme will appear in the Plus section of the PlayStation Store. The first 10,000 Plus subscribers to download this theme (5,000 SCEA Plus subscribers and 5,000 SCEE Plus subscribers) will receive access to the Public Beta Trial.
- Check your email
- After you’ve downloaded the Killzone 3 XMB Theme, you will receive an email on Oct. 25th containing the Public Beta Trial promotion code and further instructions through the address you registered as your PSN Sign-In ID. Make sure you’ve set your notification preferences to accept emails from SCE, or we won’t be able to contact you.
Those of you who make it into the Public Beta Trial are expected to provide honest gameplay feedback, report bugs and glitches, and help test our network code in real-world scenarios. In short, we’re counting on you to help us improve Killzone 3! In return you’ll get a good taste of the multiplayer mode, including its brand-new Operations game type, party system, and jetpack and exoskeleton vehicles.
And if that doesn’t convince you to take a shot at the Public Beta Trial, maybe this new trailer will:
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Go get that theme you Plus subscribers. 
