Sounds like alpha 2 starting very soon with beta to follow right after.
"If you were one of the lucky PAX attendees to receive a code for Alpha 2 and have been trying to figure out how to redeem it, fear not! We’ll be rolling out a new website (and forums) very soon and it will allow you to apply your code to your HAWKEN account! While we haven’t announced an exact date for this roll-out, it’s coming in a couple of weeks.
You couldn’t make it to PAX but want in on Alpha 2? We’ll be sending out Alpha 2 invites to fans who have enlisted on the official HAWKEN website to help us test the game and stress our servers. PROTIP: If you haven’t yet, enlist right now! Following Alpha 2 is our Closed Beta Test with more information to come as we get closer to its start date. Want to know the best way to increase your chances of suiting up in your mech before launch? Participate on the official forums to stay up to date on all things HAWKEN!"