I just tried to sign up for the Beta Tester program, and every time wound up staring at an "Internal Server Error" page. The first time, I got it as soon as I pressed the button at the bottom of the registration form. The second two times, it happened when I got to the page that said, "An email has been sent...To send it again, press the 'Send" button." The email never arrived, so on the second two attempts I pressed that "Send" button and immediately got a Server Error.