Same thing is happening with me, and I've contacted them many times and still have not received any response. I first registered with POTC Online on 5/31/06, yes almost a year ago. Throughout the months I would receive updates of game, information, etc. Then on 3/9/07 I received the e-mail about me registering to receive my priority beta key, which I registered and such just to receive the "Thanks for joining POTC Online" e-mail. Then just on 4/13/07 I received the Stress Test e-mail just to find out that I cant even try, because they didnt send out my beta key yet. I was really not in a good mood because I have been looking forward to playing this game since 5/31/07 when I registered to test/play.
Hopefully they will respond to my e-mails sometime

and I will receive a beta key soon.
- KK