We will be conducting a stress test on Thursday, August 9 from 12:00 Noon PACIFIC Time to 4:00 PM PACIFIC Time.
The stress test is open to anyone who has pre-purchased Guild Wars 2.
We will be actively working on the game during the even
t, so you might experience connectivity problems or discover features that are not working as designed. Any issues you experience are a result of the rigorous conditions of the stress test, and are in no way representative of the state of the game at launch. By participating in this stress test, you’re helping us make Guild Wars 2 a better game. Thanks for your cooperation—we’ll see you in-game! ~RB2
Via their facebook page