Yesterday I posted with the discovery that the creepy voice heard on the sign-up page was a Spanish spell of exorcism. See here for the translation.
Today the ARG seems to have started for real. Several of those who signed up to take part received a creepy (and I mean creepy) phone call. The embedded video below was a recording someone made.
The call has been traced to New York, to "a number registered to Sprint Sepulcrum LP. It was first activated on 04/10/2007. The phone is registered to an address between w 15th street, w 16th street, 7th and 8th avenues in NYC".
Interesting stuff! Glad I didn't receive that call in the middle of the night, it would have freaked me out!