I am one of the devs of Darkfield VR, a space dogfighting game for Oculus Rift. It is has been designed for Oculus Rift, however, we understand that not many people are having a dev kit right now. One of our backers suggested that we should include TrackIR support, and so we did in our latest alpha

www.Darkfield-Alpha.com
You can seen the head movements in this trailer video:
http://www.youtube.com/watch?v=yaVPyhBhRSY
The support is experimental, since we do not own a TrackIR setup. For testing purposed, we used FaceTrack Noir and it worked quite well.
Currently, we recommend to disable the z-axis, since you can quite easily get your head stuck in the seats or cockpit walls.