By purchasing Killzone 3 new (specially marked copies), you will get early access to the beta for SOCOM 4. Just make sure you notice it on the front of eligible copies of Killzone 3. You can also get early access to the beta for SOCOM for regardless if you purchase the regular version of Killzone 3 or the Helghast Editions.
Killzone 3 releases February 22nd in the U.S., 23rd in Europe, 25th in the U.K. but SOCOM 4 only has a tentative release window for April while there is no set date on when the beta will become available.
Chris Roper from Zipper Interactive stated the following.
“To get early access to the beta, look for the SOCOM 4 callout on the front of all eligible copies of Killzone 3 (including both the standalone and Helghast Editions). Inside the box you’ll find a PSN code that you’ll be able to redeem for your early access as soon as the beta goes live. To find out when the SOCOM 4 multiplayer beta begins, be sure to check back at SOCOM.com once you pick up your copy of Killzone 3, hitting shelves on February 22nd.”
“We’ll have more information on the SOCOM 4 multiplayer beta itself in the near future. For now, take a look at the callout for the beta on the awesome Killzone 3 box art!”
So keep if here for more info on the beta coming soon or check out the PS Blog. Killzone 3 and SOCOM 4 are PS Move compatible so I already have my Sharpshooter gun peripheral pre-ordered set to be released around the same time as Killzone 3.