This was talked about quite a bit on BusinessWeek.com. Several of us got suspicious emails from GMATCLub.com at the same time, with what may have been a virus.
It would be nice to hear from Praet or one of the other mods. What happened to our precious site?! What took it down?? Everyone's guessing it was hacked, but we can't imagine why anyone would do that to this site!
I got that suspicious email as well and my antivirus programme popped up as i clicked on that link so it was definitely a virus. My guess is also the site was hacked.