Welcome to the hunt.

The space is interesting, at the minute we're not entirely sure if there's anything we're meant to be looking for, but it's good to document everything.
Also, I believe this
maybe a new addition to the source code, but it's sort of nestled within a few lines it's possible I've missed it. Down by the mailing list sign-up, hidden in the source code is the message:
< !-- real people should not fill this in and expect good things - do not remove this or risk form bot signups-- >
Not entirely sure what to make of it. Might be new considering the 1029 Twitter tweeted this morning. Perhaps it's an indicator we'll be recieving mail soon? I've been signed up to that mailing list since the Soulstorm site was first announced and I don't think I've ever got an e-mail from it. Also I think they've added a box where you have to confirm your age, but that's not really ARG related at all
EDIT: I just tried to sign up again and it keeps saying "please enter a value" underneath the part where you put your email address in. This is different to the error "This field is required" when you simply don't write anything in the email address box. Is that happening to anyone else? Again probably not ARG related.