I was unaware of this until this morning when I saw the links in the Canon Fodder blogs on Waypoint.
Basically, at the end of one of the episodes of Hunt the Truth, you can hear a strange noise, which, if analyzed correctly and deciphered, it will give out a bunch of coordinates.
I can't tell you more, because I don't actually know more. I've been reading through the pages of the discussion, but with the shitty connession I have here at work I can't do much else.
This stuff is, for what I can understand, quite serious. Try and take a look at it yourself.