Yeah, apparently Monolith was bought by Warner Brothers during development of FEAR and due to the most awkward licensing agreement I have ever heard of, Monolith keeps full intellectual property rights on FEAR, except Vivendi Universal gets the name FEAR, and can make games using that name. Which is where the FEAR expansion, Extraction Point, comes in.
It's almost like the Interplay -> Baldur's Gate deal, except the company who owns the related intellectual property is developer owned by another media group. I imagine there's a limit on it though or else we'll be seeing FEAR Dark Alliance coming out with Sierra labels and no connection to FEAR proper.