The story is told through a series of emails, written by a certain Mark Condry. No idea if the events are real or not, haven't bothered to do any research since I'm only half way through...

http://www.dionaea-house.com

EDIT: For some reason, this is starting to remind of Hotel Dusk. O_o

EDIT 2: Well, I just finished it. Quite the story it was, unfortunately, that's all it is, a story. Turns out it was a hype machine for a theatrical play, which is going to be headed to the silverscreen in 2008 as The Occupants.

Really old indeed & surprisingly no one bothered to read the story besides you...?

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I'm having Blair Witch flashbacks....
I didn't really get it the first time. I just skimmed and skipped to when he was sending text messages every five minutes.

I've expected the messages & didn't mind about them.

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Once again, I don't have the foggiest idea what you're attempting to say.