Looking forward to Killzone: Mercenary? Then go sign up for the multiplayer closed beta! You have until 2:00PM PDT on July 17 to sign up, and if chosen you'll be sent an email with directions on how to get into the beta.
I've played a good chunk of Mercenary on the PlayStation Vita not too long ago and it's pretty great. Gorgeous visuals, and some solid controls for a handheld first-person shooter. Hopefully there will be a decent multiplayer community that forms around this one.
Killzone: Mercenary Closed Multiplayer Beta: Sign-Ups Now Live [PlayStation.Blog]