After the release and subsequent success of Alan Wake on the PC, it was only been a matter of time until the XBLA follow-up American Nightmare joined suit. No official word on the project has been produced, likely due to a timed exclusivity deal with Microsoft, but some Steam registry files found recently lead us to believe we'll hear more soon.
Two files in Steam have been found referencing Alan Wake's American Nightmare. Both appear to be small registry profiles with various attributes that don't help us figure out a release date. Suffice to say, there is some sort of PC port of American Nightmare being worked on.
When contacted on the subject, we learned that Remedy is not, "prepared to comment on it yet." Considering American Nightmare was released via XBLA on February 22, we should probably expect to wait at least 90 days before any PC port announcements are made, right? That seems reasonable.