Well it\'s over now, here\'s their official statement:
"The "Hack Our Box Challenge" is now officially over due to the security risks it posed to us and to our ISP. Please don’t attempt to break in anymore. Sorry for the inconvenience, and thanks for your interest."
Sounds to me like no one was able to break in, but their ISP was going crazy at all the nerds doing scans on the IP. Hehe, neat.