Stress testing is about putting load on the servers to see how they stand up to the rigourous pounding they'll take when a few hundred or more people are doing their thing on them. In the email I received this morning they ask me to log in twice a week during the load testing and quest, fight, or what ever I feel like. And I will certainly oblige by doing so. Personally I can not wait to make my Asgardian!
While the email doesn't state any privacy or non-disclosure requirements, when you then log into the beta site to download the client you are greeted with a confidentiality agreement. So unfortunately this will probably be the last I post about this for a while. I'm generally not a big fan of hiding details about MMOs from fans.
Anyway, for those who also got the invite, see you in SWO!