http://community.playhawken.com/index.php?%2Ftopic%2F6284-we-got-you-souvenirs-from-new-york-comic-con%2F

For anyone who missed out on the alpha, theres a new way into the BETA, starting on the 26th

Sign into your account on PlayHawken.com.
Click on the Redeem Code link.
Enter the following code: NYCCPILOT
PLEASE NOTE: ​This code has a limited duration and number of uses. It will expire after Sunday, October 21.
This code will grant access to all Closed Beta events.
Accounts that redeemed an Alpha 2 code or participated in Alpha 2 will be automatically invited to Closed Beta, meaning these players should NOT redeem this code.
Your account has now been added to Closed Beta!

This is just the first of many multi-use Closed Beta codes