ArenaNet is looking to further fine-tune the Guild Wars 2
servers following their second beta event, so next week players will get another chance to explore Tyria during another stress test event. Testing is scheduled to begin at 10:00am PDT on Wednesday, June 27th and conclude later the same day at 2:00pm PDT.
The Guild Wars 2 stress test will be open to pre-order customers. Previous beta characters will be available for the event, so all you need to do is login and pick up where you left off.
Source: Guild Wars 2 Stress Test Announcement