So guess what I found waiting for me in the mail?
Ross Watson, senior RPG editor for Dark Heresy at Fantasy Flight Games, was kind enough to send me a free copy of both Arkham Horror and the expansion Kingsport Horror as a thank you gift for the Dark Heresy character generator.
Awesome. Now I just need to trick my friends into playing it with me. They trusted me with Catan, and one of them is a Lovecraft fanatic, so hopefully it won't be too hard to rope them into it.