The H.P. Lovecraft Historical Society is in post-production of their adaptation of "The Whisperer in Darkness." We don't know exactly when it will be released, but their blog keeps you updated, and it looks close (And if you want to prepare for it by reading the story, you can find it here. Print it out, mix it with some business papers, and read it at work.)
As you may remember, these guys did a very cool film version of The Call of Cthulhu in the style of the classic silent expressionist movies. Now, they've advanced to the time of the first talkies. Below is a second trailer they released, but this is more spoiler-heavy (with a view of the monsters) so be warned. I can't wait for this thing to come out.