First person to post gets it. U.S. residents only, I believe.
https://auth.station.sony.com/login?service=https%3A%2F%2Faccount.station.sony.com%2Fj_acegi_cas_security_check&theme=dcuo&locale=en_US
How to redeem your beta key:
Enter the web address into your web browser.
Enter your Station...