Quick! Boot up your Metal Gear Online beta, download that one final patch (it doesn't take too long, we promise) and report for duty. The highly anticipated demo just went live a little earlier than expected (delay notwithstanding) for all territories. You'll need to create a character (fyi: you won't be able to change your name, face, or 'voice') and pick your initial skill set before firing up a match. After a couple unsuccessful attempts, we got into one but conveniently had no idea what to do so we're going to recommend you spend some time training.
Want to play some MGO with your pals at Joystiq? Leave your character name in the comments. To add someone to your MGO-specific friend list select "Personal Data," then "Player Search," enter their name and select "Add to Friend List."